Italian energy giant Eni says it has resumed oil production in Libya after months of interruption due to the civil war.
According to the corporation it is tapping 15 wells and producing some 31,900 barrels of oil per day.
French energy company Total says it restarted some production last week.
Meanwhile, NATO says warplanes have struck several military targets in Muammar Qaddafi's hometown as anti-Qaddafi forces besiege the area.
The alliance said on September 26 that it hit eight targets around Sirte the previous day, including an ammunition and vehicle storage facility, a multiple rocket launcher, and other military sites.
Anti-Qaddafi fighters meanwhile encircled the city from the east, south, and west.
The siege of one of Qaddafi's last bastions comes as Libya's new rulers say they have unearthed a mass grave in Tripoli of more than 1,200 prisoners slain by his regime during an uprising in 1996.
compiled from agency reports