RALEIGH — Christopher Jonathan Parvenik threatened his girlfriend, and police found an improvised explosive device at the house he rented from her, they said in arrest warrant charging him with possessing a weapon of mass destruction and communicating threats.

In charging Parvenik, 35, of 4505 Draper Road, police said they found an “improvised explosive device (bomb)” that had to be handled by a bomb-squad technician.

They did not say if the device could be detonated.

The bomb was at the house where Parvenik lived, they said.

He was arrested Thursday afternoon at another home at 4220 Knightsbridge Way, a single-family home owned by a man on Brooklyn, N.Y.

Police got involved when the girlfriend called them Wednesday and said Parvenik had threatened her on Dec. 18. She also said she went to the house she owns on Dec. 22 and found the suspicious item there, according to Raleigh police spokeswoman Laura Hourigan.

It was unclear why the girlfriend waited to contact police.

Parvenik’s bond was set at $102,000.