The union is aiming to pressure the online retailer by threatening delays in package deliveries during the critical holiday season.

Amazon.com Inc. workers at the company’s sole unionized warehouse in the US joined a broader strike by the International Brotherhood of Teamsters.

Teamsters union says Amazon workers at seven warehouses plan to walk off the job Thursday morning in multiple states.

Bundled up and huddled around propane and diesel heaters, the group appeared upbeat and optimistic as strike organizers provided them with hats, jackets, hand warmers, beverages and snacks.

The Staten Island Amazon facility, known as JFK8, employs more than 5,000 workers, and about 100 of them joined the picket line early Saturday.

Amazon workers at four California facilities will join their striking colleagues on the picket line Thursday morning after reaching a stalemate during labor negotiations.

The Teamsters said the strike will begin Thursday at several facilities, including in New York City, Atlanta, California and Illinois.

The International Brotherhood of Teamsters said workers at seven Amazon facilities will begin a strike on Thursday morning.

With Christmas two days away, workers at four Amazon warehouses in Southern California are on strike Monday on claims the corporate giant refuses to recognize their union and negotiate fair contracts.

Teamsters union says Amazon workers at seven warehouses plan to walk off the job Thursday morning in multiple states.

Amazon workers have walked off the job at seven facilities throughout the U.S., including the company's Queens location in New York City, as they push for contract talks with their union.