ROOSEVELT - ? Police say a man held at gunpoint in Nassau County yesterday was ordered to strip before being robbed of his valuables.The incident happened at a home on Pennywood Avenue in Roosevelt a little after 1 a.m. The unidentified 30-year-old victim told police he went to the location to meet a woman. Authorities say upon the victim's arrival, four other men appeared and stole the victim's Mercedes car, cell phone, and jewelry. The men left the victim in his underwear. Nassau police are asking anyone with information to call Nassau Crime Stoppers at 1-800-244-TIPS.