An East Windsor priest accused earlier this week of sexually assaulting a minor was arrested Friday on federal firearms charges. The Rev. Paul Gotta, 55, is charged with aiding and abetting both the unlawful transport of a firearm in interstate commerce and the purchase of a handgun by a juvenile, a news release from the U.S. Attorney's office stated. Gotta was placed on leave by the Catholic Church on Monday after the state Department of Children and Families received a complaint regarding the sexual abuse of a minor that involved him, said Maria Zone, spokeswoman for the Hartford archdiocese. He also was connected to the investigation of a teenager arrested in June on weapons and explosives charges, and who allegedly made a threat against a Bloomfield school. East Windsor police are investigating the sexual assault allegation against Gotta, who is administrator of St. Philip and St. Catherine churches in East Windsor, Zone said in a written statement.