ALSO READOil prices rise as Saudi Arabia says producers will cooperate beyond 2018 Oil dips after 3-year high; Opec, Russia cuts seen to support market Brent crude hits $70 on Russia, Opec cuts, ignores North American rig gains India to surpass China as the biggest importer of LPG Oil prices crosses $65 a barrel, near June 2015 high after cuts by OPEC
The United States, France and Britain launched 105 missiles on Saturday, targeting what they said were three chemical weapons facilities in Syria in retaliation for a suspected poison gas attack in Douma on April 7.
U.S. West Texas Intermediate (WTI) crude futures were down 59 cents, or 0.9 percent, at $66.80 a barrel.
U.S. energy companies added seven oil rigs drilling for new production in the week to April 13, bringing the total to 815, the highest since March 2015, energy services firm Baker Hughes said on Friday.
Despite this, Brent is still up more than 16 percent from its 2018 low in February, due to healthy demand and also because of conflict and tension in the Middle East.