A photocall of foreign ministers was cancelled by the US after the UK's Foreign Secretary Ed Miliband and other European counterparts refused to be pictured with Russia's envoy Sergei Lavrov.
The head of the luxury car-maker Bugatti has promised to stop leaving his keys in his own car after his £2m model was stolen from a company site in Zagreb.
Artificial intelligence-powered "doorbell cameras" are being tested by a team of international experts in Canada to warn communities about approaching polar bears as climate change increases the risk of dangerous encounters.
Cryptocurrency worth more than $6.3bn (£4.7bn) has been stolen from a major exchange - with one industry insider telling Sky News it is "the largest bank heist in human history".
Shares in Google's parent company Alphabet have suffered their worst-ever day on the US stock market, falling more than 12% and knocking around half a trillion dollars off its value.