Spain has declared a national state of emergency and imposed a night-time curfew in an effort to help control a new spike in Covid-19 infections.
U.S. infectious disease expert Anthony Fauci said on Sunday it would be clear whether a COVID-19 vaccine was safe and effective by early December, but that more widespread vaccination would not be likely until later in 2021.
US coronavirus cases have hit a record daily high as states grapple with a renewed wave of infections.
Libya's warring factions have signed an agreement on a permanent ceasefire, after five days of talks in Geneva.
US President Donald Trump and his White House challenger Joe Biden clashed over Covid and race while trading corruption charges, in their final live TV debate.
US national security officials say Iran was responsible for sending threatening emails to Democratic voters ahead of next month's presidential election.
US President Donald Trump and his predecessor, Barack Obama, have directed blistering attacks at each other during rival rallies.
A number of people taking part in a protest against police brutality have reportedly been shot dead or wounded in Nigeria's biggest city, Lagos.
The Cameron Peak wildfire has become the biggest fire in Colorado state history after burning over 200,000 acres.
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.