Explosive slipped through mail slot damages Mt. Washington business
An explosive that was slipped through a mail slot damaged a Mt. Washington heating and cooling business Monday night, according to Pittsburgh police.
The initial investigation began about 10:40 p.m. when police received a burglar alarm call at Boehmer Heating and Cooling on Hargrove Street, according to Public Safety spokeswoman Sonya Toler. About eight minutes later, she said, the business's fire alarm went off.
Fire crews responded but found no fire at the business, Toler said, and the business owners could not be reached.
Just before 11:30 p.m., the fire alarm went off again, she said.
Fire crews responded again and found a lot of smoke but no fire, Toler said. There was damage to the ceiling above the entrance. Crews determined there had been an explosion, she said.
Arson investigators and the bomb squad responded. Investigators believe that an explosive was slipped through the mail slot, Toler said.
No one was in the building at the time. An investigation continues.
Megan Guza is a Tribune-Review staff writer.