PACIFICA, Calif. (KRON) – Crews are on the scene of a hazardous materials investigation in Pacifica, according to a tweet from the North County Fire Authority.

The investigation is in the 1100 block of Crespi Drive. People are being asked to avoid the area.

The North County Fire Authority serves Brisbane, Daly City and Pacifica.

This is a developing story. Check back for updates.