Albertsons is giving up on its merger with Kroger a day after it was rejected in two courts and it is suing the grocery chain, saying it didn’t do enough to secure regulatory approval of the $24.6 billion agreement.

The supermarket chain had tried to join forces with Kroger, but judges sided with federal and state regulators who charged that the merger would reduce competition.

Grocery-store giant Albertsons Cos. said Wednesday that it is walking away from its merger with rival Kroger Co., a day after two judges blocked it.