ARMED police surrounded a house in Thornton Heath this evening (Tuesday).
The house in Headcorn Road, and several others nearby, were evacuated during what police called a "pre-planned operation" at around 6pm.
Scotland Yard have yet to release any further information about what happened.
A neighbour told the Advertiser: "I went out to Tesco to get a few things and saw lots of police pointing guns at a house next door.
"Some of the officers were hidden behind a van directly outside the house and others had dogs. The police helicopter was hovering overhead.
"They eventually knocked the door down and went inside."
The family living in house were led to safety, alongside a number of others, while police searched the building.
A crowd of residents gathered at the end of the road as a senior police officer explained the situation to a woman who lived at the address in question.
At around 7pm the armed and dog units left the premises and, a few minutes later, an officer led the woman and her family back inside.
No one is thought to have been injured during the incident.
