A man in his late 20s was shot dead sitting in a car in Hyde Park yesterday afternoon, Boston cops said.Officers responding to a call at 5:36 p.m. for a person shot on Frazer Street in Hyde Park found the man suffering from numerous gunshot wounds.Commissioner William B. Evans said the man appeared to be targeted by an attacker on foot.The man, whose name police have not released, was rushed to an area hospital with life-threatening injuries.