Snipers shot dead three supporters of powerful opposition tribal chief Sheikh Sadiq al-Ahmar in Yemen's capital on Monday, a tribal source said, blaming government troops.
"Three of Sheikh (Sadiq) Ahmar's supporters were shot dead by snipers stationed on rooftops near the tribal leader's home in Al-Hassaba neighbourhood" in north Sanaa, the source said.
The attack came despite a conditional truce which Sheikh Sadiq's office said on Sunday he has agreed to, following a request from Vice President Abdrabuh Mansur Hadi, which left the troubled city relatively calm on Monday.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Under the truce terms, Sheikh Sadiq has agreed to pull his forces from public buildings they seized during battles that have killed nearly 140 people since May 23.
Separately, two gunmen attacked a military checkpoint near Hadi's residence late on Sunday, a military official told AFP.
Both assailants, two civilians, and a soldier from the First Armoured Division, commanded by dissident General Ali Mohsen al-Ahmar, were all killed in the attack, said the official.
Under the constitution, Hadi replaces embattled President Ali Abdullah Saleh, convalescing in the Saudi capital Riyadh after surgery for wounds he suffered in an explosion in the presidential compound in Sanaa on Friday.
Yemen is now mired in political uncertainty because of the veteran Saleh's absence, as many dismiss his low-profile deputy Hadi as the next head of state and point to Saleh's eldest son Ahmed, commander of the elite Republican Guard, as the likely successor.
The opposition says Ahmed was preparing to take over from his father before the popular uprising started four months ago.
TRANSFERING POWER
Earlier, dissidents had called for a swift power transfer as the opposition vowed to block the return of Saleh, whose party insists he will be back after surgery in Saudi Arabia.
A youths' committee which has been a key player behind an uprising against Saleh's nearly 33 years of autocratic rule called on Monday for immediate steps to ensure a power transfer.
It urged "all national and political forces to begin with forming an interim presidential council... and creating a national transitional council," in a statement.
The committee also called for the forming of a "government of technocrats" to lead the transition.
