Libyan activists called for gatherings to be held in Tripoli and Benghazi to demonstrate against the violence that resulted in the death of the US ambassador and three others.

Promoted on the social media website Facebook, the demonstrations were scheduled for 5 p.m. Thursday. Organizers asked those planning to attend to wear either blue or white.

The demonstrations were called to demand security and the rule of law, and to represent the true teachings of Islam, organizers wrote.

The call to action came after US Ambassador Chris Stevens was murdered along with three others when demonstrators sacked the US Consulate building in Benghazi on Tuesday.

Demonstrations erupted Tuesday across the Middle East and North Africa in protest of an inflammatory anti-Islam film produced in the US. It is unclear if the Libyan attack was linked to the film, or was a pre-planned act of terror timed to mark the anniversary of the September 11, 2001, attacks, as some officials now believe.

On Thursday, mobs attacked the US embassies in Egypt and Yemen as violent protests continued.