Belgian authorities were investigating Thursday how far the network of attackers who carried out the deadly bombings in Brussels reached, as a state broadcaster reported that a second man likely took part in the subway explosion.

RTBF said it was unclear whether the unidentified man, who was captured on surveillance camera carrying a large bag, was still alive. Prosecutors did not immediately comment on the report.

Khalid El Bakraoui, 27, died while carrying out the suicide bombing, which involved an explosion in the second car of a subway as it was pulling out from a station in central Brussels on Tuesday morning.

The blast was the more deadly of two attacks, including earlier explosions in the Brussels airport departure hall in which two bombers were killed. One of those bombers was El Bakraoui's brother, Ibrahim.

Belgian prosecutors said they found statements from Ibrahim in a rubbish bin near the house where he was picked up by taxi on the morning of the bombings that suggested he was afraid of being caught imminently by police.

Local media reported that the brothers had hidden a surveillance camera outside the house of Belgium's nuclear director, indicating other potential plans that may have been cut short.

A third airport attacker, shown in widely circulated photos pushing a luggage cart in a black bucket hat with a light jacket on, is still being sought by Belgian police.

Authorities are stringing together a complex web of interlacing evidence, with Belgian media reports naming a third suicide bomber as Najim Laachraoui, who was already sought in connection with November's terrorist attacks in Paris.

The key surviving suspect from those attacks, Salah Abdeslam, was captured in Brussels just days before the deadly explosions in the Belgian capital.

Although he was expected to fight an extradition request from France, his lawyer, Sven Mary, said in televised remarks that Abdeslam wants to be sent to the country "as fast as possible."

Abdeslam was due in a Belgian court Thursday, but his case hearing was postponed at the request of his lawyer, who said he needed more time to study the case.

Thirty-one people were killed and 300 injured in the two Brussels attacks, though officials have warned that the casualty numbers are still apt to change. Sixty-one people are in intensive care.

The EU ministers responsible for justice and security will meet in Brussels on Thursday afternoon to "show solidarity with Belgium, discuss the actual state of play in the fight against terrorism and pursue swift completion and implementation of legislation."

EU Home Affairs Commissioner Dimitris Avramopoulos said Wednesday that the emergency meeting would serve to "put ... pressure on everybody to do more."

He criticized the slow progress on new security measures that have been proposed by the European Commission.

"If now is not the time to step up cooperation, then I don't really know when is," Avramopoulos said. "It's beyond time to get serious about security, because safety is also one of the fundamental rights of our citizens."

Belgians are struggling to understand how the attacks could have been carried out by men who were born and raised in the country, where three days of national mourning are under way.

A man who said he knew the brothers and their family told dpa that they seemed like normal, if angry, young men who had recently been released from prison.

"They were not fanatics; not religious fanatics," said Makran Hakim, 49, who used to work as a barber in the Brussels neighbourhoods where the brothers spent time.

A national minute of silence is scheduled to be held across Belgium at 2:30 pm (1330 GMT) in memory of the attacks' victims. A tribute will also be held at 2 pm in the Belgian parliament, due to be attended by King Philippe and Queen Mathilde.

Latest news

Syrian opposition rules out future role for President al-Assad

The Syrian opposition said Friday it would not accept any role for President Bashar al-Assad in the future of the war-torn country, reacting to a recent US shift saying that removing al-Assad is no longer a priority for Washington.

Russian Army integrates breakaway forces of Georgian province

Parts of the small fighting forces of the Georgian breakaway province of South Ossetia have been placed under Russian military control, Russian Defence Minister Sergei Shoigu said on Friday.

Czech Republic's Pilsner Urquell beer is now Japanese

Japanese brewing company Asahi completed its takeover of the Czech brewery Pilsner Urquell on Friday, Asahi said in a statement.

Judge approves 25-million-dollar settlement of Trump University case

A US district judge on Friday approved a 25-million-dollar settlement of lawsuits and state fraud allegations against Trump University, the US president's now-defunct business venture.

Former Thai premier Thaksin to junta on reconciliation: 'Cut me out'

Former Thai prime minister Thaksin Shinawatra on Friday announced that he is not interested in the junta-led reconciliation process, three days after the junta handed him a half-a-billion-dollar tax bill for his past business deal.

Dalic: We welcome possible deal between Agrokor and banks

The government welcomes the possibility of an agreement being concluded between the Agrokor food company and creditor banks, and the bill on vitally important companies is not a fallback plan but the result of the government's care for the overall economic and financial stability of Croatia, Deputy Prime Minister and Minister of Economy Martina Dalic told a press conference in Zagreb on Friday.

Croatia, China sign action plan for cooperation in agriculture

The Croatian and Chinese ministries of agriculture on Friday signed an action plan for cooperation in the field of agriculture for the period 2017-2018, the Croatian ministry said in a statement.

ZSE indices up, Agrokor shares in focus of investor interest

The Zagreb Stock Exchange (ZSE) indices on Friday rose by more than 1.8%, with stocks of the Agrokor food and retail concern being in the focus of investor interest again.

Berlin police defend handling of Berlin market attacker

Berlin police defended themselves on Friday against accusations that they stopped surveillance on Berlin Christmas market attacker despite knowing in June 2016 he was dangerous.

Croatia, creditors tailor emergency measures to save tottering giant

Croatia's tottering retail and food giant Agrokor reached an agreement with its creditors, putting its debts standby and allowing it to continue working during emergency restructuring, the Croatian branch of Austria's Erste Bank said Friday.

Agrokor's creditors say standstill agreement to go into force today

A standstill agreement regarding the Agrokor concern's existing financial obligations to banks will take effect on Friday, additional capital will be injected into the concern in the coming days and the concern will be actively restructured, which includes a change of its management, it was said on Friday after a meeting between Agrokor's suppliers and creditor banks.

Palestinians, UN slam Israel's new settlement plan

Palestinians, Israeli activists and the UN lambasted the government of Israeli Prime Minister Benjamin Netanyahu on Friday, a day after it gave the go-ahead for the first new West Bank settlement in a quarter of a century.

South Sudan rebels release three abducted foreign oil workers

South Sudanese rebels have released three foreign engineers they abducted in early March in the oil-rich Upper Nile region, Foreign Affairs Ministry official Mawein Makol Arik said on Friday.

Turkish opposition: Imprisoned party chief has gone on hunger strike

The head of Turkey's pro-Kurdish opposition party has launched a hunger strike from prison.

European leagues threaten Champions League schedule clashes

The European Professional Football Leagues (EPFL) on Friday threatened schedule clashes on Champions League matchdays in an ongoing dispute with the governing body UEFA.

Danish court revokes citizenship of IS volunteer

A Danish appellate court on Friday stripped a man of his Danish citizenship for volunteering to fight for the extremist Islamic State in Syria.

Banks and Agrokor agree on key elements of standstill agreement

Member banks of the coordinating committee of financial creditors and representatives of the Agrokor food company have in principle agreed on key elements of a standstill agreement, which is expected to be signed later today, announcing changes in the company's management team, Erste Bank said in a statement on Friday afternoon.

Syrian man on trial in Sweden; mosque attack labelled terrorism

A Syrian man went on trial Friday in the southern Swedish city of Malmo, charged with terrorism and arson after an attack last year on a building used as an assembly hall by Shiite Muslims.