Ontario police respond to shooting involving Homeland Security officers

Ontario police responded to a "request for emergency assistance" after Department of Homeland Security officers were involved in a shooting, authorities said. Whether anyone was struck by gunfire was unclear.

The request was made at 6:33 a.m. in the 2800 block of South Vineyard Avenue, the Ontario Police Department said in a statement, adding that its officers were not involved in the initial incident.

The location is in a residential neighborhood west of the Whispering Lakes Golf Course.

"Several Ontario Police Officers responded to the scene to provide traffic control and scene security while DHS conducted their investigation," the police department said in a statement. Homeland Security and the FBI were investigating the shooting.

Ontario police referred all media inquiries about the shooting to a Homeland Security spokesperson. DHS did not immediately respond to ABC7's request for comment.

There were no reports of injuries or arrests.