Met Police are looking for armed attackers as more than one killed in two separate terror incidents in central London. Police and ambulances were alerted to reports a van hit people on London Bridge shortly after 22:00 BST.
Armed officers went to nearby Borough Market where they were responding to reports of stabbings in the area. London Ambulance Service said at least 20 people have been taken to hospital.
Prime Minister Theresa May described the incidents as “dreadful events” and will chair a meeting of the government’s Cobra emergency committee later.
The Metropolitan Police tweeted: “At 0025hrs 4/6/17 the incidents at #LondonBridge & #BoroughMarket were declared as terrorist incidents.”
London Mayor Sadiq Khan said it was an “horrific terrorist attack”.
He added: “The situation is still unfolding and I would ask all Londoners and visitors to our city to remain calm and vigilant.
“We don’t yet know the full details, but this was a deliberate and cowardly attack on innocent Londoners and visitors to our city enjoying their Saturday night. I condemn it in the strongest possible terms.”
The attacks began just after 10pm when a van sped towards pedestrians at 50mph on the landmark bridge, scattering people across the road, leaving many injured. The van then came to a stop at nearby Borough Market when at least three suspects began a marauding attack armed with large knives, stabbing people at random.
Police have opened a casualty bureau. Telephone numbers are 0800 096 1233 and 020 7158 0197