Both chambers of Bolivia's Congress unanimously passed legislation on Saturday to annul the contested October 20 elections and pave the way for a new vote without former president Evo Morales, a breakthrough in the political crisis.

Interim President Jeanine Anez, a former senator and opponent of Morales, has indicated that she will sign the law so it can go into effect, though it was not clear when.

Passage of the bill comes as anti-government demonstrators lifted road blockades to hold talks with Anez aimed at ending weeks of unrest that have left more than 30 dead in clashes with security forces.

Anez is scheduled to meet late Saturday afternoon with protest leaders from El Alto and other parts of Bolivia where road blockades have choked off food and fuel to cities.

"They've guaranteed to us that all social sectors will be present so we can once and for all reach deals to pacify the country," said Public Works Minister Yerko Nunezon Friday.

It was unclear what protest leaders would demand from Anez.

In recent days, protesters have marched to demand justice for people killed in clashes and the repeal of a law Anez' government passed that gave the military broad discretion in the use of force to restore order. Some have also pushed for Morales to return to Bolivia to carry out the rest of his term.

Morales, an iconic socialist leader in Latin America who had been in power for nearly 14 years, has said he was toppled in a coup and has relocated to Mexico, which has granted him asylum.

Morales' children left the country early on Saturday with instructions from Anez that they be provided safe passage, interim interior minister Arturo Murillo wrote on Twitter, posting a picture of boarding passes that showed them heading to Buenos Aires.

(With input from Reuters)