A man has been shot dead by officers in a “terrorist-related” incident in south London, the Met Police have said.
It is believed a number of people have been stabbed in the incident at Streatham High Road, police said.
Witnesses on social media have said they heard three gun shots fired just after 14:00 GMT on Sunday and people were being treated by doctors.
London Ambulance Service said it had a number of resources attending the incident.
One person tweeted: “Something major happening in Streatham High Road. Armed police and roads closed off”.
BBC journalist Steffan Powell, in Streatham, said the incident happened at the bottom of his road.
“There were armed police everywhere, they have been telling residents to stay inside,” he told BBC News.
He saw a helicopter and police officers patrolling the streets.
He said pedestrians still on the street were being allowed to head away from the scene.