SALT LAKE CITY, Utah USA -- 2News has learned a man has been arrested in connection with last month's bombing at the Salt Lake City library.

Authorities say the man is linked to two other bombings in the United States.

Thomas James Zajac (1992 Photo). Photo: KUTV

Third floor window blown out of the Salt Lake City library. Photo: KUTV

Main Library after the explosion on the third floor. Photo: KUTV

Documents filed at federal court show that Thomas James Zajac has been charged with possessing an unregistered destructive device.

Click here to read the legal documents.

On September 15, what appeared to be a pipe bomb exploded inside the Salt Lake City library, blasting through a window and forcing the evacuation of the entire building.

Police say the detonation happened on the third floor of the library in a lounge area. The bomb was reportedly left inside of a bag on the library's northwest corner. No one was hurt by the explosion and the library sustained minor damage.

According to the federal charging document the bomb planted in the library included a 60 minute kitchen timer connected to a battery. The wiring then went to a rocket igniter and a fuse connected to a galvanized pipe containing explosive material.

The document states that the bomb could have been the library for as long as 60 minutes.

There was also a partial road flare contained in the explosive device which was connected to cardboard and placed in an Arby’s bag.

The charging document indicates that a fingerprint from the suspect was located on the model rocket igniter. The document also indicates that the suspect’s description matches that of a witness and video from the Salt Lake City library.

No one was hurt by the explosion and the library sustained minor damage.

The U.S. Attorney is holding a press conference at 2 p.m. Monday.

Zajac has lived in Salt Lake City and Provo. His fingerprints were on file because of arrests in Ohio and Illinois, said Michael Minichino, a federal firearms agent.