UN Security Council expresses 'grave concern' over Libya's weakening security

The U.N. Security Council is expressing "grave concern" at the weakening security situation in Libya as the North African country struggles to control armed groups and transition to democracy.

The council approved a nonbinding presidential statement Monday that "stresses the urgent need to strengthen military and police institutions" and strongly condemns the killing of unarmed protesters in the capital, Tripoli, last month.

The country has been on uncertain footing since 2011 with the end of the civil war that toppled longtime dictator Moammar Gadhafi.

The Security Council statement asks the Libyan government to better control arms stockpiles and keep them out of the hands of "terrorist and extremist groups."

It also condemns the use of torture in the country's "illegal detention centers," where thousands are still held since the war.