LITTLE ROCK, Ark. (AP) — A three-judge panel on Monday dismissed part of a lawsuit challenging Arkansas’ new U.S. House map, which split the Little Rock area among three congressional districts.

The federal panel tossed some of the constitutional claims in the lawsuit challenging the redistricting plan approved by the majority-Republican Legislature last year.

The lawsuit filed by two Black Democratic lawmakers and four other residents claimed the new map violates the Constitution and the federal Voting Rights Act by moving 23,000 predominantly Black voters out of the 2nd District in central Arkansas. Those voters were split between the state’s 1st and 4th congressional districts.

The ruling gave the residents 30 days to file an amended complaint focusing on their remaining claims that the new map violates the Constitution and the federal Voting Rights Act. The lawsuit had claimed the new map diluted Black voters’ influence.

“What we can say at this stage is that the plaintiffs are a few specific factual allegations short of pleading a plausible vote-dilution claim,” the judges’ ruling said.

Heavily Democratic Pulaski County, which includes the Little Rock area, is currently in the 2nd District.