Two injured, taken to hospital, after 4 car crash on Route 5.

Police are investigating the four-car crash that sent two people to the hospital in Wallingford on Friday night.

According to police, the cars collided around 11 p.m. on Route 5 near the Wallingford/North Haven town line when one driver heading northbound tried to make an illegal U-turn.

Two people were taken the hospital. The extent of their injuries is unknown.

Route 5 was closed while police investigated the crash and worked to clear the scene.

State police and North Haven police provided mutual aid.

Police are still investigating.