Egypt's military has carried out dawn bombings of Islamic State targets in Libya, according to reports by state television.
Seven days of mourning were declared in Egypt after Islamic State militants released a video claiming to show the murder of 21 Egyptian Christians kidnapped in Libya.
The video has been condemned by governments around the world, while the Egyptian leadership vowed to respond to the "criminal killings".
David Cameron stressed Britain "has not abandoned Libya" after Egypt bombed Islamic State targets in the country in response to the murder of 21 Egyptian Christians.
"What we face in Libya is a very difficult situation, with far too many armed militias, without a proper government and with the growth of ungoverned space," the Prime Minister said.
"What the whole world needs to do is come together and work for Libya that has a national unity government."
The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.