Hillary Clinton declared herself the Democratic Party's presidential nominee after a victory in the New Jersey primary, becoming the first woman to head a major party's presidential ticket.

"Thanks to you we've reached a milestone, the first time in our nation's history that a woman will be a major party's nominee," Clinton told supporters in New York, noting she was speaking in a hall with a glass ceiling and joking about breaking the glass ceiling of US politics.

Clinton's win in New Jersey lifted her above the threshold of 2,383 delegates needed to secure the party's presidential nomination.

Early Wednesday, US broadcasters CNN and NBC called a win for Clinton over rival Senator Bernie Sanders in the California primary - the delegate-rich state that is the biggest prize in the final six-state primary contests held on Tuesday.

Clinton won in the states of New Mexico and South Dakota as well, while Sanders came out on top in North Dakota and Montana.

The results marked the end of five-month primary process and both Clinton and presumptive Republican nominee Donald Trump turned their attention to a contest against each other in November elections.

Clinton said she wants to help write the next chapter in US history and take America forward, lambasting Trump for proposals she says would take the country backwards.

This election "really is about who we are as a nation," Clinton said. "It's about millions of Americans coming together and saying we are better than this, we won't let this happen in America."

She accused Trump of promising supporters an economy and a world he cannot recreate, saying the Republican "wants to win by stoking fears and rubbing salt in wounds and reminding us daily just how great he is."

Trump added to his own delegate count with victories in all five Republican contests in New Jersey, New Mexico, South Dakota, Montana and California.

The billionaire businessman, who as the last Republican candidate in the race already is the party's presumptive nominee, won large majorities in the states, according to official but incomplete results.

Trump told supporters he would "lead the Republican Party to victory" in November, stressing he would work hard to win the votes of Republicans who had supported other candidates in the primaries as well as Democrats and independent voters.

He specifically reached out to Sanders' supporters who feel alienated by their party leaders, saying "we welcome you with open arms."

Despite Clinton's declaration of victory and apparently insurmountable math, Sanders refused to concede the nomination, instead vowing to fight on.

Speaking to a raucous crowd of supporters in Santa Monica, California, Sanders said he would contest the June 12 primary in the nation's capital Washington, and "take our fight" to the party nominating convention in Philadelphia in July.

"I am pretty good at arithmetic and I know that the fight in front of us is a very, very steep fight," he said. "But we will continue to fight for every vote and every delegate we can win."

"We take our fight for social and economic justice, racial justice and economic justice to Philadelphia," he declared.

Clinton supporter Lareen Russell told dpa in Santa Monica that she voted for Clinton "because it is time for a woman in the White House."

Sanders "has some great ideas, but I think it is time for him to back off. Clinton has the experience," Russell said.

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.