Four persons were injured last night in a crash on I-295 that occurred when a D.C. police car pulled into the path of northbound vehicles to join a chase, police said.

None of the injuries was critical, police said. Police closed parts of I-295 from the Suitland Parkway to South Capitol Street for two hours. The two officers in the patrol car were uninjured, police said.

Police said officers began chasing a stolen truck about 7:40 p.m. near Pennsylvania and Branch avenues SE. The truck, which police said was stolen in Virginia, drove onto I-295 and headed south, then exited at Eighth Street and returned to the highway going north.

The cruiser, which was on a utility road near Portland Road, pulled into a northbound lane. It collided with a pickup truck with two women inside, police said.

After the impact, a second truck clipped the first truck from behind. Then a tractor-trailer smashed into the first pickup.

Firefighters pulled the two women from the pickup. The driver of the second truck and the driver of the tractor-trailer were also taken to D.C. General Hospital.

Meanwhile, the two juvenile occupants of the stolen truck jumped out near Eighth Street and North Carolina Avenue SE. They were caught and charged with unauthorized use of a motor vehicle and with possession of the implements of a crime, police said.