Authorities in Utah say two men have been arrested on suspicion of placing an incendiary device under a news media vehicle in Salt Lake City. The bomb didn’t go off.

Police and fire department bomb squads responded on Friday when a suspicious device was found under the vehicle parked near an occupied building.

Investigators determined the bomb “had been lit but failed to function as designed”, according to court records cited by CBS affiliate KUTV.

The FBI identified two suspects and served a search warrant at a home in Magna, west of the city’s downtown. Two men, aged 58 and 31, were arrested and could face charges related to weapons possession and threats of terrorism, ABC affiliate KTVX reported on Sunday.

Neighboring homes were evacuated during the search, which turned up explosives and “explosive-related components”, firearms, illegal narcotics and other paraphernalia, court records say. Authorities say they also found at least two devices that turned out to be hoax weapons of mass destruction.

There was no information about a possible motive and the relationship between the two suspects wasn’t immediately known.

News media have descended on Salt Lake City following last week’s assassination of Turning Point USA co-founder Charlie Kirk.