UN Special Envoy of the Secretary-General for Syria Staffan de Mistura.jpg
UN Special Envoy of the Secretary-General for Syria Staffan de Mistura as he speaks about the International Syria Support Group's Humanitarian Access Task Force, at the European headquarters of the United Nations, in Geneva, Switzerland, 19 May 2016.
Photograph: EPA/MARTIAL TREZZINI

The United States and Russia still have a "tiny window of opportunity" to salvage the now broken-down ceasefire deal in Syria, UN Syria envoy Staffan de Mistura says, warning that trust in their intention to solve the crisis was "seriously broken."

"I want to believe, because I am still a naive UN official, that they really meant what they said ... and they really wanted it to work," de Mistura says.

"I'm asking, indeed urging both of them to go that extra mile to see if they can save their agreement ... and do so at the 11th hour."

Noting attacks of unprecedented frequency and intensity against eastern Aleppo, De Mistura calls on the council to ensure a cessation of hostilities against civilians, the establishment of weekly 48-hour humanitarian pauses in fighting and medical evacuations.

Related stories

No breakthrough in US, Russian diplomatic talks on Syria

US and Russia agree on Syria ceasefire plan

Syria truce largely holds as death toll tops 300,000

UN envoy to share plans for new Syria peace talks on Friday

Russian-Turkish ceasefire takes effect in Syria

Latest news

Thousands of Romanians revive anti-government protests

Thousands of Romanians turned out on Sunday to renew their demands for the government to step down amid accusations it is trying to protect corrupt politicians.

Francis, first pope to visit Anglicans in Rome, weighs S Sudan trip

Pope Francis became the first leader of the Catholic Church to visit the Anglican community in Rome on Sunday, where he said he was considering a trip to famine-struck South Sudan.

Ibrahimovic lifts Man United past Southampton in League Cup final

Zlatan Ibrahimovic scored an 87th-minute winner as Manchester United beat Southampton 3-2 in an exciting League Cup final on Sunday.

London screens Iranian director's film amid Oscars boycott

Thousands of people watched a free screeening of Iranian director Asghar Farhadi's film "The Salesman" in London on Sunday to coincide with the Oscars.

Real Madrid stage comeback to stay top; Messi scores in Barcelona win

Lionel Messi scored the winner as Barcelona beat Atletico Madrid 2-1 on Sunday to move top of the Spanish first division.

Dubrovnik Sun Gardens Hotel member of The Leading Hotels of the World

The Dubrovnik Sun Gardens Hotel has joined the Leading Hotels of the World, Ltd., a global hospitality consortium of more than 375 hotels and resorts in over 75 countries.

Biggest Bosnian Serb party ceases all contact with Izetbegovic over ICJ judjment review request

The main committee of the biggest Bosnian Serb party which makes up the ruling majority in Bosnia and Herzegovina decided o Sunday that its officials would cease all contact with member of the Bosnian President Bakir Izetbegovic until the crisis occurred following the submission of a request to the International Court of justice (ICJ) to review its ruling against Serbia is resolved.

Egypt court adjourns Morsi retrial over prison escape

An Egyptian court adjourned a case against former president Mohamed Morsi until March 29 on Sunday, during the first session of his retrial over orchestrating a prison escape during the 2011 uprising.

Hamas rejects Netanyahu's proposal for international forces in Gaza

The Islamic Hamas movement rejected on Sunday Israeli Prime Minister Benjamin Netanyahu's proposal to send international forces to the Gaza Strip, the coastal enclave that Hamas has been ruling since 2007.

Deloitte: Growing optimism among CFOs

Chief financial officers (CFOs) in Croatia are more optimistic about growth and financial prospects in 2017 than they were last year, with most of them expecting increases in their company's revenue, a survey shows.

Russian agents main suspects for attempted coup in Montenegro

Russian citizens Eduard Shumakov and Vladimir Popoc, suspected of organising terrorist activities in Montenegro and forming a criminal organisation, are agents of Russia's Main Intelligence Agency (GRU), British, U.S. and other intelligence agencies confirmed, the Podgorica-based media reported on Sunday.

Six injured, 96 detained in Berlin fan clashes

Six people were treated in hospital and 96 detained in clashes in Berlin between fans of Hertha Berlin and Eintracht Frankfurt, police said Sunday.