UPDATE: Robertson Park Grass Fire Contained

Firefighters extinguished a small grass fire at  Thursday afternoon, Livermore-Pleasanton Fire Department Battalion Chief Jeff Peters said.

The area of dry grass caught fire from a lawn mower. Most of the field was mowed down, which kept the blaze from spreading.

"If it was a windy day then we would of had a problem," Peters said.

Emergency crews were dispatched to the south Livermore area at about 1:10 p.m. Firefighters were able to knock down the blaze in about five minutes, Peters said.

The fire was contained to about a half acre, near a bike path and to the north side of the creek, Peters said.

No injuries or structure damage was reported in the fire, Peters said.