Three armed teenagers are accused in a Sunday night home invasion at 411 S. McKean St., where they allegedly forced three victims to the floor, terrorized and robbed them of a handgun and $175.

At one point, one of the suspects, police said, put his gun to the back of the head of one of the victims and squeezed the trigger.

The gun, however, did not go off, according to court documents.

Charged with robbery, aggravated assault, burglary, conspiracy and theft are Anton Lamont Jackson, 18, and Clecy Thompson, 18, both of Butler, and a 14-year-old Butler boy.

Afourth defendant, Frank Zurzolo Jr., 18, of Butler Township, is also charged with conspiracy for allegedly "setting up"the robbery, investigators said.

Police arrested Thompson today. He was arraigned and placed in Butler County Prison on $50,000 bond.

Jackson and Zurzolo, who were arrested and arraigned Monday, are in the county jail on $75,000 and $50,000 bonds, respectively.

A copy of the 14-year-old's complaint, filed in juvenile court, was not available.