Sixty-five firefighters and two helicopters battled and knocked out a brush fire in Mission Valley on Thursday, according to the San Diego Fire-Rescue Department.

SAN DIEGO (CNS) - A brush fire burned one and half acres in Mission Valley, a San Diego Fire-Rescue spokesman said Friday.

Crews remained on the scene until 2 p.m. today to make sure the blaze did not re-ignite, said Lee Swanson, who added the cause is under investigation. There were no injuries, he said.

The fire, which started shortly before 6:30 p.m. Thursday in the 3100 block of Camino del Rio, threatened the River Club Run apartments, but there were no reports of structural damage.