British Apache helicopters targeted a military base being used by Libyan leader Muammar Gaddafi's force to terrorise local people, the Ministry of Defence has announced.
The raid came as Gaddafi threatened to carry out attacks against civilians in Europe unless Nato halts its campaign of airstrikes.
The Nato-led international coalition said in a statement that its forces have destroyed more than 50 military targets in the west of Libya this week.
The strikes are aimed at hitting forces loyal to Gaddafi which have been massing in western cities and along major lines of communication.
MoD spokesman Major General Nick Pope said Apaches from the Army Air Corps were used to target the Al Mayah military camp near Az Zawiyah, west of Libyan capital Tripoli.
"The camp has been used by regime forces as a base from which to terrorise the local population," said Maj Gen Pope. "In a single mission before midnight, UK Apaches used Hellfire missiles and cannons to destroy or disable a command and control vehicle, a bunker firing position and three main battle tanks."
The successful sortie came after missions on Thursday night, in which RAF Typhoon and Tornado aircraft destroyed ammunition storage facilities near the central Libyan town of Waddan and a militarised 4x4 in the Al Khums area, near Tripoli.
Speaking from an unknown location, Gaddafi sent a message by telephone to supporters rallying in Tripoli's Green Square.
He warned Nato countries that the Libyans would "one day take this battle ... to Europe, to target your homes, offices, families, which would become legitimate military targets, like you have targeted our homes".
He added: "We can decide to treat you in a similar way. If we decide to, we are able to move to Europe like locusts, like bees. We advise you to retreat before you are dealt a disaster."