As stormy weather drenched the Bay Area early Sunday morning, Interstate Highway 880 saw two injury accidents in the East Bay, one of which was a nine-car pileup that blocked three lanes for almost an hour.

The chaos began around 2:30 a.m. with a multi-vehicle collision in Hayward on northbound I-880 near the A Street exit.

Two people were transported to the hospital after four vehicles had collided, one of which had overturned, according to the California Highway Patrol.

The freeway was shut down for over an hour while the two of the vehicles had to be towed away.

The cause of the crash was still under investigation late Sunday morning.

Then at 4:51 a.m., three cars collided on northbound I-880 near the 11^th Street off-ramp in Oakland, according to CHP Sgt. Diana McDermott.

The crash scene grew to a total of nine wrecked vehicles after six other drivers were unable to avoid the first collision, said McDermott.

The nine-car pileup blocked the three left lanes of I-880 and a Sig-alert was issued at 5:18 a.m. By 5:50 a.m., all lanes had re-opened and the Sig-alert was lifted.

One person was transported to a hospital with minor injuries, according to McDermott.

McDermott later said that the stormy weather was a factor in the nine-car pileup as the rain-slick roadway prevented six of the vehicles involved from stopping and avoiding the initial crash.