Joe Biden has won eight of the 14 states that voted to pick a Democratic White House candidate on Super Tuesday, a remarkable rebound for his campaign.
Pete Buttigieg, the former Indiana mayor who made an ambitious run for president, has announced he is ending his campaign for the White House.
Former US vice-president Joe Biden has been handed a huge boost in the race to challenge Donald Trump in November's election.
The US and the Taliban have signed an "agreement for bringing peace" to Afghanistan after more than 18 years of conflict.
The US and its Nato allies will withdraw all their troops from Afghanistan in 14 months if the Taliban uphold their commitments under a deal to be signed shortly, officials say.
At least 33 Turkish soldiers have been killed in an air strike by Syrian "regime forces" in north-western Syria, a senior Turkish official has said.
US President Trump in a news conference on Wednesday said the US was "very, very ready" to handle the coronavirus, as he appointed his vice president Mike Pence to take charge of the outbreak.
Delhi remains on edge after the third consecutive night of rioting, with reports of Muslim homes and shops being targeted by violent mobs
Several European countries have announced their first coronavirus cases, all apparently linked to the growing outbreak in Italy.
Russia's unmanned Luna-25 spacecraft has crashed into the Moon after spinning out of control, officials say.
Donald Trump has confirmed that he will not take part in Republican presidential debates with his rivals in the race for the White House.