Authorities say someone drove across the Oklahoma Capitol lawn and knocked over a Ten Commandments monument that a group has been suing to have removed, smashing it to pieces.

Oklahoma Highway Patrol Capt. George Brown says the person drove into the monument on the statehouse steps Thursday night, abandoned the vehicle and fled. Brown says the vehicle was impounded and authorities are searching it for evidence.

The 6-foot-tall granite monument was erected in 2012 after Republican state Rep. Mike Ritze and his family paid nearly $10,000 for it. The American Civil Liberties Union had been suing to have the monument removed, arguing it violates the Oklahoma Constitution.

Other groups have since asked to erect statues on the Capitol grounds, including one that wants to erect a 7-foot-tall statue of Satan.