One person was killed and two were injured in a collision that blocked state Highway 1 near Ano Nuevo State Park in San Mateo County on Monday evening, according to the California Highway Patrol.

At about 5:40 p.m., officers responded to a report of a head-on collision on Highway 1 near Green Oaks Way, CHP Officer Peter Van Eckhardt said. The collision was between a GMC truck and Nissan Altima, he said.

Emergency crews and the San Mateo County coroner's office were called to the scene, he said.

A Sig-alert was issued at 6:28 p.m. closing all lanes in both directions between Pescadero and Santa Cruz, according to the CHP. Traffic was being diverted off Highway 1 near Green Oaks Way, CHP officials said.

The highway reopened in both directions, the Sheriff's Office announced at 9:11 p.m.