Store clerk critically injured after another David Hasselhoff sign theft

Connecticut police say a convenience store clerk has been critically injured trying to stop the theft of two signs featuring images of actor David Hasselhoff.

The signs featuring him advertising iced coffee. Officials say more than 500 of them have been stolen from stores in several states in recent months.

Authorities say a 36-year-old clerk at a Cumberland Farms in Shelton saw a man put the signs into an SUV shortly after 1 a.m. Tuesday. Police say the worker was struck and dragged by the SUV and landed on his head.

Police say the clerk is hospitalized in critical condition, and authorities are looking for the suspects. The employee's name hasn't been released.

On Aug.17, the actor tweeted a video of one of the signs attached to an airplane, flying above a crowd on a beach.

"Thanks to @cumberlandfarms and Jeff! You guys rock! What a cool banner," he wrote.

Hasselhoff is best known for his starring roles in the TV shows "Baywatch" and "Knight Rider."

The Associated Press contributed to this report.