Canadian border guards at four crossings in the Lower Mainland of B.C. have walked off the job in response to a security scare.

CTV Vancouver reported Sunday night that lineups at four crossings into Canada are massive. Gary Barndt reported from the station's helicopter that the lineups appeared to be several kilometres long at one crossing.

Managers with the Canada Border Services Agency are trying to staff the affected crossings -- Huntington, Aldergrove and Peace Arch, and Pacific Highway -- but Canada-bound traffic is just trickling across.

Agency spokesperson Faith St. John told CTV Vancouver there are reduced lanes at the crossings, all of which are open. "We have called in all our management staff. As more managers arrive, more lanes will be opened."

This was the first time she could recall all four crossings been affected this way.

Rhonda Fuller, a CTV Vancouver news producer, told the station at one point that in the 20 minutes since she last talked to them, "I haven't moved a car length."

The situation started in the afternoon when U.S. Homeland Security officials told the RCMP that a suspected killer from California, who should be considered armed and dangerous, might try to cross the Canadian border.

They thought he was heading northward towards Anacortes, Wa.on a motorcycle -- located about 60 kilometres due south of the border, but sharing a ferry route with Sidney, B.C. -- where a motorcycle rally was taking place. Many Canadians attended the Oyster Run, as it's called.

The RCMP informed the border guards, who walked off first at Huntington at 2:15 p.m. , then the other three crossings. About 60 guards are believed to be off the job.

Canada's border guards are currently unarmed -- the Conservative government has promised a 10-year program to change that -- and have the right to walk off the job if conditions are dangerous. The guards exercised that right.

The B.C. guards also did so twice this past winter: Once in February when they heard an armed and dangerous individual might cross at the Peace Arch crossing, and another time in January when two murder suspects tried to run the border at Blaine, Wa..

Several disgruntled motorists interviewed in their vehicles say if arming the guards would put an end to these disruptions, they were all for it.