Horizon Air ticket agents were interviewed by the FBI today after a report that one agent sold a ticket to a man wanted in connection with an alleged plot to smuggle explosives into Washington state from Canada.

"They did interview three of our agents" in Bellingham, about 90 miles north of Seattle, said Cheryl Temple, spokeswoman for the Seattle-based commuter airline.

Temple said she did not know the substance of the interviews and could not provide further details.

But a source close to the investigation said the ticket agent called the Bellingham office of the U.S. Border Patrol this morning to report having served the man, Abdelmajed Dahoumane, 32, on Dec. 17.

The man had a French passport and paid in Canadian currency for a ticket from Bellingham to Seattle, with a connecting flight to Las Vegas, the source said, speaking on the condition of anonymity.

Dahoumane's picture was widely broadcast after Canadian police on Thursday issued an arrest warrant accusing him of illegally possessing explosives with the intent to cause damage or injury.

Dahoumane is the suspected accomplice who has been sought by Canadian and U.S. authorities since Dec. 14, when Ahmed Ressam was arrested at Port Angeles, Wash., allegedly trying to smuggle nitroglycerin and other explosives into the United States, said Cpl. Leo Monbourquette of the Royal Canadian Mounted Police in Montreal.

News reports have identified Dahoumane as the man who stayed with Ressam in a Vancouver, British Columbia, motel in the weeks before Ressam's arrest.