* Biggest protest in weeks in Tunisian capital
* Security forces fire in air, protesters burn tyres
* Witnesses say several people hurt, sent to hospital
* Protesters call for interim govt, premier to step down
(Adds people injured, paragraphs 2 and 8)
By Tarek Amara
TUNIS, Feb 25 (Reuters) - Tunisian soldiers fired shots into the air on Friday in an attempt to disperse tens of thousands of protesters in central Tunis demanding changes to the interim government, some burning tyres and throwing rocks.
Witnesses said several people were injured in the demonstration and transported to hospital. Security officials were not available to comment.
The rally, dubbed by the demonstrators a “day of rage”, appeared to be the biggest since uprisings in North Africa’s most developed country ended the 23-year rule of President Zine al-Abidine Ben Ali on Jan. 14 and sparked pro-democracy protests across the Arab world.
Demonstrators shouted slogans calling for the resignation of Prime Minister Mohamed Ghannouchi, a former ally of Ben Ali, from the interim government. Some protesters carried images of Ghannouchi’s face merging seamlessly into that of the Ben Ali’s, shouting “shame on the government!”
“The only demand we have is the end of this government,” said Alia Soussi, a 22-year-old student. “We hope Ghannouchi gets the message.”
Witnesses said protesters burned tyres and threw rocks through the windows of the Interior Ministry building, long a symbol of repression under Ben Ali’s more than 20-year rule. A source at the Interior Ministry told Reuters protesters were also destroying cars parked outside.
Military helicopters circled over the rally, which had formed in defiance of a government ban on demonstrations since Ben Ali’s ouster. The protesters remained in place despite security forces firing warning shots in the air.
“I saw a young girl whose foot was badly injured by a bullet,” one witness said. Several other witnesses told Reuters by telephone that a number of people were hurt.
The interim government charged with organising elections has undergone several changes after street protests, but Ghannouchi, seen by some as an asset for his familiarity with the country’s affairs, has remained.
He was prime minister for more than a decade under Ben Ali’s rule, which Tunisians saw as oppressive and corrupt.
Earlier on Friday, demonstrators protested in Tunis against Libyan leader Muammar Gaddafi’s bloody crackdown on an uprising there, that was inspired by the revolts in Tunisia and Egypt.
Thousands of people, including large numbers of Tunisian and Egyptian migrants, have been streaming across Tunisia’s border to escape. (Reporting by Tarek Amara; writing by Richard Valdmanis, Editing by Janet Lawrence)