Just days before President Barack Obama was due to arrive in California to continue fundraising efforts for his re-election campaign, the glass in the windows and doors of his west side Los Angeles campaign office was broken.

According to The Los Angeles Times, police are investigating the incident, which occurred at an office in the 6700 block of South Centinela Avenue Sept. 22 at approximately 7:25 p.m. when BB-gun pellets and other objects were used to break the windows. The Times reported that the Los Angeles Police Department is not sure if the incident was captured by video camera.

LAPD Cmdr. Andrew Smith told the Associated Press that because no other businesses in the low-crime area were impacted, detectives believe the attack to be politically motivated.

Campaign staffers were in the back of the building when the incident occurred, heard the sound of smashing glass and found the windows broken. The AP also reported that “no rocks or projectiles were found and police believe one or more attackers used a tire iron.”

The FBI and Secret Service were notified and, according to the AP, are assisting with the investigation. The broken windows and door have been boarded up.