Multiple wrecks on the Don Holt Bridge and Interstate 26 caused major rush-hour headaches for commuters Tuesday morning.

Authorities reported as many as seven cars and a motorcycle were involved in at least two wrecks in the westbound lanes of the bridge about 8 a.m. Traffic was backed up past Clements Ferry Road for more than an hour.

The largest collision involved five cars and a motorcycle caught in a chain reaction, according to Charles Francis, public information officer for the Charleston Police Department. There were no serious injuries, he said.

A second wreck involving two more cars also was reported near the bridge.

An earlier wreck in the eastbound lanes of I-26 near Eagle Drive also contributed to the backups, which at one point stretched eight miles to the College Park Road exit.

Motorists on U.S. Highway 78 reported long delays just to get onto the interstate. A three-car wreck on I-26 at U.S. 78 was reported later about 9 a.m.