Police are searching for the drivers of three vehicles who may have witnessed a fatal crash last week that claimed the life of a Wellesley man out for a bicycle ride.

Alexander Motsenigos, 41, was riding his bike on Weston Road near the intersection of Linden Street on Friday at about 2 p.m. when he was allegedly struck and killed by an 18-wheel dump trailer, according to Wellesley police. The truck did not stop.

Police have since located the truck and its driver. The driver has been interviewed, but no charges have been filed, according to police and the Norfolk district attorney’s office.

“The Wellesley Police Department believes there may be other witnesses to the crash,’’ said police in a statement issued Tuesday night. “The video footage from area traffic cameras shows three other vehicles that drove through the area in which the crash occurred around the same time.’’

The first car is a black four-door sedan that was at the intersection of Linden Street at Weston Road at approximately 1:56 p.m. on Friday. It was behind a gray Volvo that has already been identified.

The second car is a brown or grey large sport utility vehicle with a roof rack and sun or moon roof, possibly a Toyota. It was traveling south on Weston Road near the intersection of Linden Street at the time of the crash.

The third car is a small, dark-colored, two-door sedan or coupe that was traveling directly behind the SUV.

None of the cars are believed to be involved in the crash, said Lieutenant Marie Cleary, a Police Department spokeswoman, in an e-mail, though the drivers or passengers may have seen it happen.

None stopped at the scene, she said.

“We are looking to speak with the drivers and any possible passengers in these vehicles,” she said.

“If they did observe the crash or passed through the area immediately following the crash, they may have seen something that can assist the detectives with the investigation.”

Anyone with information about the accident should call 781-235-1212.