A routine smoke complaint late Wednesday night resulted in an explosives investigation that brought in the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives, and left a New Haven resident under police questioning.

The New Haven Fire Department responded to a smoke complaint at 17 Hubinger St., near Edgewood Park, at approximately 9:16 p.m. and discovered what was believed to possibly be bomb-making materials, New Haven Police Department Spokesman Joe Avery said. The NHPD Hazardous Device Unit, NHPD detectives and FBI personnel initially identified materials inside the residence as explosives and improvised explosive devices, he added.

After further investigation, however, these materials were identified as a “small cache of large m-80 and m100 type fireworks,” Avery said. He added that the NHPD interviewed Christopher Clark, 26, earlier Thursday after he turned himself in to the police.

“This investigation is ongoing and is being looked at very seriously by ATF, FBI, and New Haven Police and Fire Departments,” NHPD Chief Frank Limon said Thursday afternoon.

Calls to the New Haven FBI office were not immediately returned.