CUYAHOGA FALLS, Ohio -- Federal agents with the division of Alcohol Tobacco and Firearms, and the FBI, spent the day Wednesday interviewing residents of Center Park Place Apartments, trying to learn as much as possible about Mark Campano.

Campano, who is a former anesthesiologist, was arrested after two explosions rocked the complex late Monday.

Katherine Seem was inside her second floor apartment putting up christmas lights when she says she heard the first blast, then ran outside to investigate. Thats when the second blast went off.

"I see the flash coming from underneath and I hear the glass shatter and it was like a big loud boom and I was like...'that was a bomb." Seem tells Fox 8 News.

She raced downstairs to try and help Campano, describing a thick cloud of smoke, and burning papers inside his shattered apartment.

"His fingers were missing and hanging off in pieces and he was screaming 'help me, help me I blew off my hand."

Another neighbor, Terry Mistalski, also raced over to try and help.

" It smelled like fireworks, like somebody lit some fireworks off" Mistalski said. "And he had a hole in his table, I guess that was where he was making the bomb."

Inside the apartment investigators say they found 30 devices that could be pipe bombs. Neighbors say they knew Campano had at least two guns and some unusual sleeping habits. One neighbor says on his computer screen was "666" and the devil.

Ohio State Medical Board records obtained by Fox 8 News show the former doctor, who was practicing in Dover, Ohio, came before the Board in Novemember of 2005 when his license was 'summarily suspended based on the Board's determination that there is clear and convincing evidence that the doctor's ability to practice is impared due to relapse on clonidine; and that the doctor's continued practice presents a danger of immediate and serious harm to the public."

His license was permanently revoked, according to state records, in February 2006.

Neighbors in Cuyahoga falls say they knew Campano was unhappy about losing his practice, but never imagined he was building bombs.

Lance Kimmell, the ATF's Resident Agent in Charge of its Cleveland Office tells Fox 8 that the investigation is still in its infancy, and it is too soon for them to be able to tell if he was building the devices because he had an agenda, or if he was building them for his own amusement.

"We will continue to leave no stone unturned until we are able to figure out what [the suspect] was up to and why he was doing it." added Kimmell.

He also said that Campano had never attracted their attention before Monday night's explosions.

The devices taken from his apartment were immediately secured with the help of the Summit County Sheriff's Bomb Squad and will be analyzed at a federal laboratory to determine their contents.

Neighbors in the meantime are stunned by what happened in the small apartment building, including Michael Rollins who lived next door to the suspect until this past October and now calls it "scary" to think of what could have happened during the time they were living so close to him.

"He could have killed me and my son and my wife," Rollins tells Fox 8.

Campano was released from an Akron hospital on Wednesday and immediately taken into federal custody, arrested on charges related to making explosives. Stay with Fox 8 News and FOX8.com for updates on this story.