SAN DIEGO - Nine motorists were arrested on suspicion of drunken driving in or near an overnight checkpoint in the Pacific Beach area of San Diego, a police officer said Saturday.

Ten vehicles were impounded and tire deflation devices were used on two vehicles that failed to stop for officers at the checkpoint in the 2400 block of Grand Avenue that began at 10:50 p.m. Friday and concluded Saturday at 3 a.m., said San Diego police officer Mark McCullough.

Officers subsequently arrested the two motorists who failed to stop on suspicion of drunken driving, McCullough said. One of them was on probation for DUI with two prior DUI convictions.

McCullough said 914 vehicles passed through the checkpoint, adding that 689 of those were screened by officers. Twenty-four motorists were detained for further evaluation of their sobriety.