TACNA, Ariz. (AP) - A southwestern Arizona man remained hospitalized Thursday with leg injuries in what authorities suspect was a pipe bomb explosion.

Yuma County sheriff's Capt. Eben Bratcher says 31-year-old Kobey Coulter was tinkering with explosives inside a shipping container Tuesday. Deputies arrived at his home to find him with severe leg injuries.

Bratcher says the Tacna man lost his left leg below the knee, and doctors were working to save his right leg. Deputies serving a search warrant at Coulter's home Wednesday say they found items used to make pipe bombs.

It is illegal to manufacture improvised explosive devices. Bratcher says authorities will review the case to determine whether to file charges against Coulter.