DIAMOND BAR — A Diamond Bar parolee was behind bars Thursday after deputies discovered bomb-making materials inside his home while investigating a report of a family disturbance, authorities said.

Steven Vern Ladd, 48, was arrested on suspicion of an outstanding narcotics warrant and possession of bomb components following Wednesday’s 9:30 a.m. incident in the 22000 block of Hilton Head Drive, Detective Ed Nordskog of the Los Angeles County Sheriff’s Arson-Explosives Unit.

Bomb squad officials examined the immediate area and examined the device, which resembled a pipe bomb, after it was discovered in Ladd’s closet, Nordskog said.

“It was real except there was (no explosives) in it,” Nordskog said.

The 8-inch long steel pipe was fitted with end caps and a fuse system, he added.

Deputies had responded to a report of a family dispute and discovered Ladd had a no-bail warrant for his arrest prior to finding the suspicious device, Lt. John Saleeby of the sheriff’s Walnut-Diamond Bar Station said. The initial call was not related to the suspicious device.

“(Ladd) told us it was a movie prop,” Nordskog said. “He’s not in the movie business. There’s no legitimate reason to have something like that.”

According to county booking records, Ladd was being held without bail pending a scheduled arraignment Friday in Pomona Superior Court.