Aug 16 (Reuters) -

U.S.-based Norfolk Southern ( NSC ) said on Friday it is

closing all intermodal facility ingates to Canadian National

Railway ( CNI ) with immediate effect following an embargo

imposed by the Canadian railroad on all of its intermodal

shipments.

Both Canadian National and Canadian Pacific Kansas City ( CP )

have issued embargoes on certain shipments in advance to

a potential strike from the Teamsters Canada Rail Conference

Union that could begin as early as Aug. 22.

Union Pacific ( UNP ) also said it was adhering to the

embargoes placed by the two Canadian railroads, while actively

monitoring the labor negotiations.

The union has targeted both the Canadian rails,

demanding better wages and benefits, including provisions for

fatigue management and better crew scheduling.

The union and the railroads are back at the bargaining

table on Friday.