Police want to speak a man clearly caught on CCTV in Mayfair, central London, getting into the car before climbing back out a couple of minutes later.
Met Police said: ‘At 07:45hrs on Tuesday, 29 September, police were called to reports of a convertible red Porsche having been broken into whilst parked on Mill Street, Mayfair.
‘At 08:05hrs on the same day, police were called to reports of grey Porsche Cayenne scratched and the door lock damaged whilst parked on Carlos Place, Mayfair. A man matching description of the man who broke into the red Porsche was seen to take out a lock knife with a 5inch blade and try to gain entry into the vehicle.
‘Later at 10:53hrs, police were called to reports of a robbery at JD Sports on Oxford Street. A man, 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 near the red Porsche captures 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, failed and later left through the cut roof.
‘The suspect is described 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.’