Two people were robbed at knifepoint Saturday afternoon while driving in an open convertible on Charleston's East Side, according to a police report.

About 1:15 p.m., a 19-year-old male and his female passenger, 21, were driving east on Hanover Street toward Trident Technical College's Palmer Campus when a man approached the car while it was stopped at Shepphard Street, the report states.

The man asked the passenger if she had 50 cents. The woman said she did and was trying to get the money out of her purse when the man went to the driver's side, put his arm around the driver's head and held a knife to his neck. The robber demanded money, threatening to slit the driver's throat. The woman gave the robber $8 and the driver turned over $27. The robber reached into the convertible, grabbed a cell phone and walked away.

The robber was described as a black man, about 6 feet 3 inches tall, 275 to 300 pounds, with a shaved head. He was wearing a white T-shirt and blue jeans. The robber also was described as missing one of his fingers below his knuckle and walking with a limp.

Anyone with information about the robbery should call Charleston Police at 577-7434 or Crime Stoppers at 554-1111.