GIBSONIA — The residents of a home in Pittsburgh’s north suburbs are waiting for permission to return two days after federal authorities say they found illegal drugs and possible bomb-making chemicals there.

Police on the scene about 1 a.m. Saturday at first thought they’d found a meth amphetamine lab, said state police Sgt. Joe Davidson, Hazardous Device and Explosives Section, Hershey. He called the Allegheny County Police Bomb Squad.

“In interviews, neighbors reported explosions in the past,” said Inspector David Walsh, commander with the Allegheny County Police Bomb Squad.

Chemicals found at the home “if put together right” could create a bomb, Walsh said, but no bombs were found there.

Agents with the FBI and the federal Bureau of Alcohol, Tobacco, Firearms and Explosives have been investigating the Pine Township home since Saturday. That began after a 20-year-old man was taken from the home late Friday, allegedly unconscious after an underage drinking party.

That’s when authorities say they found hallucinogenic mushrooms growing and the bomb-related chemicals. No charges have been announced yet, but a notice on the home in the upscale Treesdale development next to a golf course says investigators found a clandestine drug lab and/or hazardous chemicals in the home that have made it unfit to live in.

Eagle staff writer Sandy Pontius contributed to this report.