May 9 (Reuters) - U.S. President Joe Biden said on

Thursday he is concerned by reports that Boeing ( BA ) has

locked out its unionized firefighters, raising pressure on the

U.S. planemaker to resolve the contract dispute.

Earlier this month, Boeing ( BA ) locked out members of the

International Association of Fire Fighters Local I-66 who have

rejected two contract offers.

"I'm concerned by reports that Boeing ( BA ) locked out IAFF I-66

members," Biden wrote on the social media site X. "I encourage

folks to return to the table to secure a deal that benefits

Boeing ( BA ) and gets these firefighters the pay and benefits they

deserve."

Boeing ( BA ) was not immediately available for comment.