Abu Dhabi National Oil Company (ADNOC) has restored most of the Murban crude oil supply going to equity holders in July after making a sharp cut earlier, multiple trade sources said on Thursday.

Partners in Murban crude producer ADNOC Onshore, which include BP, TotalEnergies, China National Petroleum Corp, Inpex, Zhenhua Oil and South Korea's GS Energy, are entitled to about 40% of production of the grade that stands at around 2.1 million barrels per day, traders said.

During the Israel-Iran conflict last month, ADNOC notified equity holders that it would cut their Murban crude supply by 3 million to 4 million barrels in July, the sources said.

It was not immediately clear what led to the changes.

Most of these volumes have since been restored, they said.

A spokesperson for ADNOC said there had been no cuts to supplies to long-term customers such as refiners.

"ADNOC has maintained uninterrupted supply to our customers, with no cessation of Murban sales contracts or nominations in June and July," he added in an email.

Japan, Thailand and India are the biggest importers of Murban crude, Kpler data showed.

(Reporting by Florence Tan and Siyi Liu; Editing by Tom Hogue, Himani Sarkar and Jan Harvey)