SINGAPORE (Reuters) – Oil prices rose more than $1 a barrel on Monday after Saudi Arabia, Russia and Iraq backed an extension of supply cuts for another six to nine months ahead of an OPEC meeting in Vienna. Front-month Brent crude futures for September touched an intraday high of $66.75. U.S. crude futures for August rose $1.90 to $60.26 a barrel the highest in over five weeks. The Organization of the Petroleum Exporting Countries (OPEC) and its allies look set to extend oil supply cuts until the end of 2019 after top producers on Sunday endorsed a policy aimed at propping up the price of crude. OPEC, Russia and other producers, an alliance known as OPEC+, meet on Today and Tuesday to discuss supply cuts. The group has been reducing oil output since 2017 to prevent prices from sliding amid a weakening global economy and soaring U.S. output. Russian President Vladimir Putin said on Sunday he had agreed with Saudi Arabia to extend existing output cuts of 1.2 million barrels per day (bpd) by six to nine months. Stephen Innes, managing partner at Vanguard Markets in Bangkok, said oil prices could also be supported in the medium term because of geopolitical tensions in the Middle East and as China’s central bank eases monetary policy to offset the impact from U.S. tariffs.