mso-bidi-font-weight:bold'>Oil prices have slightly increased on Friday, on the way to climb by more than 4% for week. Ukraine's attacks on energy infrastructure Russians urged Moscow to reduce its fuel exports and brought it on the verge of reducing its crude oil production.

Brent futures rose by 21 cents, or 0.3%, at $69.63 per barrel at 06:35 GMT, while the futures contracts for American West Texas Intermediate (WTI) crude gained 32 cents, or 0.5%, at $65.30 per barrel.

The two benchmarks should record their most sharp rise since the week ending June 13, when Brent rose by 11.7% and the WTI by 13% while Israel and Iran exchanged strikes aerial.

The two reference indexes also have reached their highest levels since August 1 this week, due of a surprise drop in weekly crude oil inventories in the United States as well as attacks by Ukraine on energy infrastructure Russians.