The blaze erupted in the lobby of the Islamic Society of Coachella Valley shortly after 12 pm and was contained about 35 minutes later, the Riverside County Sheriff's Department said.

The flames caused smoke damage to the building but no injuries, the agency said.

It broke out nine days after a Muslim married couple with ties to Riverside County opened fire at a county office center in nearby San Bernardino, raising concerns of an anti-Islamic backlash. San Bernardino is about 75 miles northwest of Coachella.

The FBI has said it was treating that shooting rampage as an act of terrorism, citing the shooters' declaration that they were acting on behalf of the militant group Islamic State. Other evidence included a large cache of weapons, ammunition and bomb-making materials seized in the investigation.    

The Riverside County Sheriff's Department said in a tweet that the fire at the Coachella Valley mosque was a possible arson.

Local television station reported that unnamed officials at the Islamic Society had said the building had been firebombed. Officials at the mosque did not answer repeated phone calls placed by Reuters.

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