NATO 'deeply concerned' by Libya violence

NATO is "deeply concerned" by the escalating violence in Libya, alliance chief Jens Stoltenberg said Wednesday, calling on all sides to stop fighting as a deadly power struggle rages.

As the battle between armed groups for control of Tripoli intensified, Stoltenberg urged the rivals to support UN efforts to broker a truce.

"We are deeply concerned by the situation in Libya. We call on all parties to end the fighting, as called for by the United Nations," Stoltenberg said in a statement.

"The current military operation and advance on Tripoli are increasing the suffering of the Libyan people and putting civilian lives at risk."