A brush fire sparked in Ramona Saturday afternoon, Cal Fire officials confirmed.

The blaze, dubbed the “Main Fire” by officials, began around 1 p.m. near Main Street and Day Street, off State Route 67.

By 2 p.m., Cal Fire officials said the fire had grown to 5 acres. Officials said some structures near the site of the fire were initially being threatened.

By 2:40 p.m., Cal Fire officials said the fire had scorched 10 to 15 acres, but crews were able to stop it from spreading any further. No nearby structures were damaged, and no injuries were reported.

CHP issued a SigAlert on portions of SR-67 as fire crews worked. Get traffic updates here.

By 5:30 p.m., fire officials said the blaze was fully contained, and crews were mopping up hot spots.

The cause of the fire is under investigation. Check back for updates on this developing story.