BALTIMORE (AP) — A union representing grocery store workers says it is negotiating with Giant and preparing for the possibility of a strike.

United Food and Commercial Workers Local 27 leaders say in a statement Sunday that they have reached a tentative agreement with Safeway. They say they’re prepared to recommend the agreement for ratification at a contract meeting on Wednesday. But they say Giant still won’t agree to a similar deal.

Giant Food said in a statement Tuesday that negotiations are continuing and Giant is committed to reaching a fair and reasonable contract

The union says its current contract extension expires Friday and it is beginning preparations in case a strike is needed. They tell members that they will share information they will need to prepare financially.