BOSTON (CBS) — Police have charged an East Boston resident after they say he caused an explosion while tinkering with bomb-making materials.

Boston Police Commissioner William Evans said the call for a house explosion on Webster Street came in at 12:40 a.m. Sunday.

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The firefighters and police officers who first arrived found 28-year-old Tomas Mikula with burns on the second floor. He was transported to Massachusetts General Hospital with second degree burns.

When police searched the apartment, they found materials to make a homemade explosive device, including PVC tubing and chemicals. Rifles were also found in the house.

Boston Firefighters respond to a home explosion on Webster Street early Sunday morning (WBZ-TV)

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The explosion created a hole in the floor, blew out some walls, and caused debris to go flying across the street, said Evans. The first and second floors were evacuated as a result.

“The guy that lives upstairs said the floor went up in the air. He said the whole thing rose and went back down,” said neighbor Jim Parziale.

Mikula faces a variety of charges, including unlawful possession of explosives, unlawful possession of a firearm, and unlawful possession of an incendiary device.

Evans said the incident was not connected to terrorism in any way.

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Police say the suspect was tinkering with explosives at the time of the blast.