Sheriff's detectives recovered two guns and arrested the driver of a car who fled a traffic stop in East Oakland Thursday afternoon, a sheriff's spokesman said.

The detectives were in the area of 73rd Avenue and MacArthur Boulevard, near the Eastmont Mall, late this afternoon conducting an unrelated investigation, Alameda County sheriff's Sgt. J.D. Nelson said.

They noticed a car driving recklessly and when they went to pull it over, the driver fled onto westbound Interstate Highway 580.

The detectives pursued the car but lost sight of it and pulled off at the Coolidge Avenue offramp.

But after exiting the freeway, they found the car had crashed underneath a highway overpass there.

The car's three occupants ran away, but detectives found the driver and arrested him. They found a 9mm handgun and an AK-47 inside the car, Nelson said.

The two other suspects in the car remain at large.