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Truck window shatters on 405 Freeway; cause unknown

Police investigate after a truck window shattered on the 405 Freeway in North Hills on Monday, April 30, 2012.

April 30, 2012 12:48:26 AM PDT
Gunfire has been ruled out as the cause of a truck window shattering on the 405 Freeway in North Hills on Monday morning.

Authorities responded to the incident near the Lassen Street exit just after 6:30 a.m. The driver told the California Highway Patrol that he didn't know what shattered his passenger-side window and was not sure if it was shot out or hit by a rock.

Officers say gunfire was not the cause, but it remained unclear how the window shattered.

No one was injured, and the incident did not affect traffic for the morning commute.