Six fires were set within 60 minutes in the Grant Hill area of San Diego, officials said Monday.
Investigators with San Diego Fire Rescue crews believe the fires are all connected.
Trees, bushes and dumpsters were set on fire at the following locations: Commercial Street and 29th Street, 39th and Imperial Avenue, G Street near 27th Street, 28th Street near Market and nearby Hoitt Street.
The first fire was reported around 12:45 a.m. at the 29th and Commercial location where a tree had been set on fire in an alley.
Minutes later, crews were called to the 30th and Imperial dumpster fire.
A bush was on fire on Hoitt Street.
Another dumpster fire was started at the G Street location.
The last fire, reported around 1:20 a.m. involved a tree.
Anyone with information about the fires can call the Metro Arson Strike Team at (619) 236-6815.
San Diego police officers arrested a 37 year-old woman in Logan Heights after she attempted to set a house on fire on Harrison Avenue. Investigators later announced the Harrison Avenue fire was unrelated to the arsons.