A Washington sex offender who allegedly made bombs in his home blew himself up Tuesday.

He was handling some of his bombs when an explosion blew the roof off his Puyallup, Washington, home. The house burned to the ground, authorities said.

A couple – owners of the house - called 911 about 11 p.m. Monday and informed police about the 26-year-old sex offender after they found him angry and handling explosives.

When police officers arrived at the scene, the man was upstairs and had a duffel bag full of explosives. After he began playing heavy metal music very loud, policemen backed away from the building, said Pierce County Sheriff spokesman Ed Troyer.

"Our deputies on the next house plot were covered in beauty bark," Troyer said. "Blinds from the top floor were blown 75 to 100 feet."

A few minutes after the deputies backed away, the top floor of the two-story house six miles southeast of Tacoma blew up. Deputies called for backup, a bomb squad and a negotiator, but it was too late.

"He either accidentally or intentionally set the explosion off, which took the whole top floor off of the residence and engulfed the house in flames," Troyer said.

After the explosion, deputies found a semi-automatic handgun, remnants of liquid explosives and bombs packed with nails inside the house. They also found the corpse of the man. The gun was underneath the body.

Troyer said the man responsible for the explosion had “some issues with law enforcement” over the past couple of years.

Police believe they know the identity of the man, but won’t release it until a Pierce County Medical Examiner's Office investigation is completed.