A man who could not provide identification for a credit card purchase physically picked up a clerk at a Hempstead gas station and slammed him to the floor in a beating captured by store video, Nassau police said in asking for help in a January case.

The suspect was trying to buy gas and other items at the Apple Green Gas Station on Peninsula Boulevard about 6:20 p.m. Jan. 8 when the clerk questioned the validity of the credit card, police said.

The man refused to provide identification and became “enraged,” going behind the counter to beat the clerk, police said.

Surveillance video shows the clerk getting a cellphone and the suspect pulling him, then picking him up and flinging him to the floor.

In a back hallway, the suspect again lifts the clerk off his feet and throws him onto the floor before punching him in the face and body.

The footage also shows a woman who accompanied the man, police said.

She watched the beating, then the two left in a dark blue Nissan Xterra, police said.

The assault left the clerk’s skull fractured and his knee ligaments torn, along with pain in his ribs, arms and ankles, police said. He was treated at a hospital, police said.

The male suspect wore a red winter hat, black jacket and tan pants, police said, while the woman had long curly hair and wore a gray hooded sweatshirt and beige pants.

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Detectives said anyone with information could call Crime Stoppers at 800-244-8477.