Local sources from Amran governorate revealed that fighting between Houthi rebels and government-backed tribes over the past four days have left at least 49 people dead. However, the rebels' spokesman, Mohammed Abdul Salam, told local media that 20 of Al-Houthi affiliates were killed by the army and not by tribesmen.
Confrontations were taking place in Al-Amsheyah, in the northern Amran governorate, where the tribe of MP Sheikh Sagheer Aziz is allegedly besieged by the Houthi affiliates.
To end the alleged siege, Six MPs have started a sit-in on Tuesday at the parliament in support of Aziz, demanding government action.
As the rebels said on Tuesday they welcomed a Qatari offer to help consolidate the truce, a Yemeni tribal chief Sheikh Zaidan Al-Moqannay, his son and four of his bodyguards were killed in a rebel ambush in Sa'ada, a police official said in a statement released by the official media.
Sa'ada and Amran, the neighboring governorates have been the scene of intermittent clashes between Houthi affiliates and army-backed people. Both sides claim that they are reluctant to renew clashes after the fierce war which ended a six-month round of bloody conflict between the two sides.
The Shiite rebel in Sa'ada and the army forces have repeatedly exchanged accusations of violating ceasefire.
The Qatari government will also resume its mediation efforts to cement a fragile truce between Shiite rebels and the government, president Saleh said.

He said the Qatari efforts would be based on a 2007 Qatari-brokered peace agreement signed by representatives of the Yemeni government and the rebels in Doha.