WASHINGTON, March 23 (Reuters) - The U.S. Supreme Court

on Monday declined to hear CoStar Group's ( CSGP ) bid to throw

out antitrust claims lodged by real estate data provider

Commercial Real Estate Exchange in a long-running legal fight

between the rival companies.

Here are some details:

* The justices ruled without comment, keeping in place a

lower appeals court decision that allowed CREXi's case to

proceed.

* CREXi is seeking an unspecified amount of damages for lost

revenue and profits based on its claims that CoStar ( CSGP ) violated

antitrust law by locking real estate brokers into using its data

platforms and blocking rivals from accessing key web tools.

* CoStar ( CSGP ) has denied any wrongdoing, saying it has no

obligation to provide competitors access to its websites and

databases.

* California-based CREXi made its antitrust allegations as

counterclaims against CoStar ( CSGP ) in a copyright lawsuit that CoStar ( CSGP )

lodged against CREXi in 2020.

* CoStar's ( CSGP ) ongoing lawsuit accuses CREXi of deliberately

copying tens of thousands of CoStar ( CSGP ) photos of real estate

properties in an alleged copyright infringement scheme.

* CoStar ( CSGP ) said in a statement that CREXi's "antitrust

counterclaims are a sideshow to CoStar Group's ( CSGP ) underlying mass

copyright infringement claims against CREXi" and that the

allegations will not delay the infringement trial.