BP PLC, citing what it called fresh evidence of fraud in the claims process, once again has asked a federal judge to halt payments from the Deepwater Horizon oil spill settlement fund.

The company said it had learned within the past week about a potential conflict involving two members of the claims administrator’s appeals panel who were reviewing payments while their law firms were submitting claims. BP’s motion for a preliminary injunction, filed on Monday, did not name the firms or the appeals panelists.