A Libyan gas company official says militiamen have attacked a natural gas complex in the country's west, injuring two guards and stealing weapons and military vehicles.

The official says the attack took place early Monday and targeted the Mellitah Oil and Gas complex near Zwara, about 110 kilometers (70 miles) from the capital, Tripoli. The complex is a joint venture between Libya's National Oil Corp. and Italy's largest energy company, Eni SpA. The militiamen fled the site briefly after seizing weapons and equipment from the guards.

The official spoke on condition of anonymity because he was not authorized to brief reporters.

A military official told Libya's official news agency that military helicopters are searching for the attackers.

Over a year after toppling Moammar Gadhafi's regime, Libya is plagued by lawlessness.