Tunisia's prime minister-designate will unveil his cabinet lineup Sunday, the presidency said, a day after he missed a deadline to form a government of independents to steer the country out of crisis.

"Mehdi Jomaa... will submit the list of his government to President Moncef Marzouki at 1800 (1700 GMT)," a presidential statement said, inviting the media to attend the ceremony.

Tunisia's technocrat Prime Minister-designate failed Saturday to form a caretaker cabinet meant to steer the country to fresh polls, on the eve of a vote set to pass a much-delayed new constitution.

Mehdi Jomaa had been expected to submit his line-up to President Moncef Marzouki Saturday afternoon but gave a press conference shortly after midnight to say he would not.

A vote by Tunisian lawmakers to adopt the country's new constitution has been delayed for a day until Sunday, said Karima Souid, information officer at the constituent assembly.

The plenary session was set for 9:00 am (1000 GMT) on Sunday, Souid, who is also an MP, told Agence France Presse.

Hundreds of Islamists with the radical Tunisian group Hizb ut-Tahrir, which advocates establishing an Islamic "caliphate", gathered in Tunis Friday to protest against the "secular" new constitution.

The protesters waved the black and white Islamist flag, and shouted slogans, including "Down with the secular constitution!" and "Establishing Islam is obligatory, sovereignty is for the Koran and sharia (Islamic law)."

Tunisian lawmakers will vote Saturday on adopting a long-delayed new constitution, more than three years after the revolution, constituent assembly officials said.

"The vote will be held tomorrow, Saturday," Mofdi Mssedi, spokesman for the speaker's office, told Agence France Presse on Friday, a day after parliament completed its review of each article in the draft charter.

A woman who accused Tunisian policemen of raping her more than a year ago complained Monday that the trial has been repeatedly delayed, saying she cannot sleep at night.

The trial opened last year but has been bogged down by repeated delays.

Tunisian lawmakers will review the final articles of a draft constitution Sunday, the vice president of the assembly said, as they inch closer to a vote over the long-delayed charter.

Lawmakers pushed through another 15 articles on Saturday and will examine the final ones on Sunday afternoon, said the National Constituent Assembly vice president Meherzia Labidi.

Tunisia's constituent assembly on Friday adopted a crucial chapter in the country's new charter defining the powers of the judiciary, and tackled others dealing with human rights and the fight against corruption.

After approving articles on the creation and prerogatives of the constitutional court, lawmakers completed the chapter on the judiciary, qualifying the legal profession as "free and independent, and which participates in the realization of justice and the defense of rights and freedoms."

Hundreds of unemployed Tunisians clashed with police Friday in the industrial city of Gabes after trying to break into a government building, amid simmering social unrest across the country, an Agence France Presse journalist reported.

The protesters hurled rocks at the police who responded by firing tear gas and chasing them through the streets surrounding the regional governor's headquarters.

Tunisia celebrated the third anniversary Tuesday of the overthrow of a decades-old dictatorship in the first Arab Spring uprising, but political divisions have hampered the adoption of a new constitution by this symbolic deadline.

Tunisia's leaders launched a low-key ceremony in the Kasbah district of the capital, where the government's headquarters are located, to mark the event.