Shares in Tinder's parent company crash after Mark Zuckerberg announces Facebook is getting into the dating game, with a new service he says is "not just for hook-ups".

Britain has not identified the suspects who carried out the poisoning of former Russian double agent Sergei Skripal, but is stepping up protection for other defectors who might also be at risk, the UK's national security adviser says.

The chief executive of UK supermarket giant Sainsbury's burst into song just hours after announcing the company will buy rival Asda.

At least one person is dead after an abandoned 26-storey building occupied by squatters in Sao Paulo caught fire and collapsed, sending chunks of fiery debris crashing into neighbouring buildings and surrounding streets.

Media reports say special counsel Robert Mueller has given a list of almost four dozen questions to US President Donald Trump's lawyers as part of his investigation into Russian meddling in the 2016 US election and whether Mr Trump obstructed justice.