Video thumbnail, Watch as man slashes roof of Porsche and tries to drive off after robbery in Westminster
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Police have issued CCTV footage after investigating a robbery and criminal damage to two cars in Westminster in an attempt to identify the suspect.

According to Met Police , at 7.45am on Tuesday, September 29, police were called to reports of a convertible red Porsche having been broken into while parked on Mill Street in Mayfair.

At 8.05am on the same day, police were also called to reports of a grey Porsche Cayenne scratched and the door lock damaged while parked on Carlos Place in Mayfair.

A man, who matched the description of the man who broke into the red Porsche, was seen to take out a lock knife with a 5-inch blade and try to gain entry to the car.

Later, at around 10.53am, police were called to reports of a robbery at JD sports on Oxford Street.

A man who is believed to be the same suspect, was seen trying to leave the shop with stolen trainers, a sports top and tracksuit bottoms.

When staff challenged the man, he threatened them with a lock knife.

CCTV footage near the red Porsche captured a man approaching the parked car, looking inside and then cutting open the roof with a knife.

Once inside, he tried to drive off in the car but failed, later leaving through the cut roof.

The suspect is described by police as a black man in his 20s, 6ft tall with black hair and a dark beard.

He was wearing a blue puffer jacket, white jeans and a grey beanie hat.

Police are appealing for anyone who recognises this man, or who has any information that could assist the investigation to come forward. They can call police on 101 quoting image 191011 or Crimestoppers anonymously on 0800 555 111.