Visa and Mastercard are close to settling a long-running antitrust lawsuit with merchants over the fees they pay while they accept card payments, the Wall Street Journal reported Thursday, citing people familiar with the matter.

Under the settlement, Visa, Mastercard and a number of banks that issue debit and credit cards including JPMorgan Chase, Citigroup and Bank of America would pay the merchants around $6.5 billion, the report said, citing some of the people.

It is not clear how the payment would be split up among the card networks and the issuing banks, according to the report.

In a regulatory filing, Mastercard said it would boost its reserve by about $210 million in the second quarter to account for claims related to a lawsuit with merchants.

However, it was not clear if the estimated increase in reserve was related to the settlement the WSJ had reported.

Visa, Mastercard and JPMorgan were not immediately available to comment on the settlement. Citigroup and Bank of America declined to comment.