Japan has warned its citizens to avoid potential terror targets in London, following the London Bridge attacks.
The nation issued a travel advisory mentioning sightseeing spots, department stores, markets, concert venues and political rallies.
Japan's foreign ministry warned visitors to the UK should "pay close attention to the surroundings, and leave quickly if any suspicious signs are seen".
Meanwhile, the US state department has said that America "condemns the cowardly attacks".
US president Donald Trump tweeted to the UK that Americans "are with you". He wrote: "We need to be smart, vigilant and tough."
But he was criticised for retweeting an unconfirmed report and for turning attention back to the US and his immigration crackdown by adding: " We need the travel ban as an extra level of safety."
British Prime Minister Theresa May has said the "terrible incident" in the capital is being treated as a "potential act of terrorism".
Labour leader Jeremy Corbyn said: "Brutal and shocking incidents reported in London. My thoughts are with the victims and their families. Than k you to the emergency services."
London Mayor Sadiq Khan said the attacks were "deliberate and cowardly".
He added: "There is no justification whatsoever for such barbaric acts."
French prime minister Emmanual Macron tweeted: "In the face of this new tragedy, France is more than ever at the side of the UK. My thoughts are with the victims and those close to them."
Canada's Prime Minister Justin Trudeau tweeted: "Awful news from London tonight. We're monitoring the situation."
Australia's foreign minister Julie Bishop described the incidents as a "shocking situation."
She said in a statement: "We stand ready to support the British government as it responds to these attacks and our thoughts are with those injured and their families."
European Commission leader Jean-Claude Juncker said: "Following latest London incidents with horror. Thoughts and prayers are with the victims and their families. Please stay safe."
