Embattled Yemeni President Ali Abdullah Saleh thanked thousands of supporters gathered near the presidential palace on Saturday for backing the constitution in a further sign he has no immediate plans to step down.
Weeks of protests across Yemen have brought Saleh's 32-year rule to the verge of collapse but the United States and neighbouring oil giant Saudi Arabia worry about who might succeed him in a country where al Qaeda militants flourish.
On Friday, tens of thousands of people, both for and against Saleh, took to the streets in Sanaa as negoiators struggled to revive talks to determine his fate.
"I salute you for your heroic stand and thank you for supporting constitutional legitimacy," Saleh told the crowd on Saturday amid a sea of portraits of the president and banners supporting his continued rule.
Saleh, who has has lost the support of many tribal, military and political backers, met representatives of several tribes, officials said, as he dug in against demands for his resignation.
Thousands of protesters continued sit-ins in the capital, the southern port city of Aden, Taiz, 200 km (125 miles) south of Sanaa, and other cities.
Protesters in Aden called for a general strike and acts of civil disobedience, closing down public transport and prompting many shops to close.
Troops fired in the air to disperse young people blocking roads, witnesses said.
Saleh wants to stay on as president while new parliamentary and presidential elections are organised by the end of the year, an opposition source told Reuters on Tuesday.
Talks over his exit have stalled and Saudi authorities have deflected Yemeni government efforts to involve them in mediation.
Rallies could spiral into violence at any time in the turbulent Arabian Peninsula state where more than half the 23 million population own a gun.
Some 82 people have been killed so far, including 52 shot by snipers on March 18.
Rows often turn to bloodshed, from tribal clashes over dwindling water resources to army skirmishes with separatist militants in the south.
Washington has long regarded Saleh as a bulwark of stability who can keep al Qaeda from extending its foothold in Yemen, a country which many see as close to disintegration.
Saleh has talked of civil war if he steps down without ensuring power passes to "safe hands" and has warned against a coup after senior generals turned against him.
Opposition parties say they can handle the militant issue better than Saleh, who they say has made deals in the past to avoid provoking Yemen's Islamists.
A well-known journalist, Abdul Ghani al-Shameri, who had been taken away by armed men belived to be security offices late on Friday, was freed unharmed, his ralatives said on Saturday.
Shamiri had run several television channels including state TV and recently resigned from the ruling party.
No further details were immediately available.