ANTIOCH -- A gas leak forced the evacuation of two county buildings Wednesday afternoon, authorities said.

No one was injured, and there are no reports of fire.

The leak was reported around 12 p.m. at the Employment and Human Services buildings in the 4500 block of Delta Fair Boulevard. PG&E crews are already on the scene, attempting to fix the leak.

Tri-Delta Transit bus lines 380, 387 and 391 are being diverted around the area and are not making stops on Delta Fair Boulevard between Fairview Drive and Belle Drive.

A campus official at Los Medanos College, located next to the county buildings, said they had not received any order to evacuate any campus facilities.

There was no estimated time to reopen the county buildings, according to a statement from Lauren Brosnan, legislative and community relations coordinator. Appointments scheduled for Wednesday afternoon have been canceled.

Any client who needs to make alternate arrangements can call 877-505-4630 or visit www.co.contra-costa-ca.us.

Contact Daniel M. Jimenez at djimenez@bayareanewsgroup.com. Follow him at Twitter.com/DMJreports.