A gas leak on Willow Road in Menlo Park was capped this afternoon and the road has been partially reopened, fire and utility officials said.

The leak was reported at 12:24 p.m. in the area of 1350 Willow Road near Ivy Drive. It involved a 1-inch plastic service line and the leak was capped at 2:34 p.m., PG&E spokesman J.D. Guidi said.

Eastbound Willow Road has reopened.

One lane for westbound traffic on Willow Road remained closed for roadway repairs.

Preliminary reports indicate the cause of the leak was an unseen gas line that was struck by a telecommunications company running fiber optic lines in a horizontal boring operation, fire officials said.