There have been reports of armed police pointing weapons at a flat on Croydon Road in Beckenham, near the recreation ground.
The Met Police confirmed armed officers were sent to the location as a precaution.
Met Police were called at 10.08am today (Friday, April 1) to an address in Croydon Road by a woman who alleged false imprisonment and assault.
She also alleged an occupant at the address had been storing a firearm at the premises.
A search is being carried out by officers but no firearm has yet been recovered.
There have been no arrests and Bromley police are currently making enquiries.
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Simon Gibbs, 35, an IT contractor and proprietor of Libertarian Home who lives in the area, was on his way to Starbucks when he found the road closed.
He said: "On the road, I saw an armed officer with a weapon trained on the upstairs windows of a flat.
"Police appeared to be engaged in a search at the front door, coming in and out with boxed equipment - a forensic kit or device, I expect.
"A silver SUV was pulled across the road, as if to deliberately block it.
"I noticed the first car in the queue heading south was owned by a driving school.
"I did not see if a pupil was at the wheel, but that would have been an interesting first lesson."
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