Grass fire temporarily forced lane closure on I-580 in Dublin, fire now extinguished

A grass fire near I-580 forced the California Highway Patrol in Dublin to issue a Sigalert Tuesday morning and temporarily close a couple lanes of traffic.

All lanes are now open, and the fire is extinguished. A CHP officer at the scene told KTVU that the fire was started in a homeless encampment in a drainage system under I-580 eastbound. 

The lane closures began Tuesday morning around 6:20 a.m. on eastbound I-580 at Hopyard Road, the CHP said in a tweet. 

There were reports of thick smoke in the area.

Traffic in the area was minimal as of 7:30 a.m. Tuesday morning.