SAN DIEGO — A cement truck overturned Thursday afternoon on Interstate 8 in Mission Valley, blocking several lanes of traffic.

The collision involving multiple vehicles was reported shortly after 1:20 p.m. on eastbound I-8 near Mission Center Road, according to a California Highway Patrol incident log. Aerial video from SkyFOX showed the truck on its side.

Three people were taken to UC San Diego Medical Center in Hillcrest to be treated for injuries and one other was taken to the Jacobs Medical Center in La Jolla. The extent of their injuries was not immediately known.

Four of the five eastbound lanes on the interstate were blocked, according to Caltrans San Diego.

Check back for updates on this developing story.