Algeria´s oldest museum, home to some of the country´s most valuable art, was vandalised during protests against President Abdelaziz Bouteflika´s bid for a fifth term, the culture ministry said Saturday.
Many who demonstrated on Friday initially gathered at university sites before heading onto the streets.
Friday's protests were the biggest the country has seen since citizens began taking to the streets in large numbers on February 22.
The president, who is confined to a wheelchair, has rarely been seen in public since suffering a stroke in 2013, prompting critics to question whether he is being used as a puppet candidate by a faction of civilian and military figures.
During the demonstrations against the Algerian President Abdelaziz Bouteflika have been injured, according to official data, 112 police officers. The demonstrations were accompanied by a strong security device that included anti-riot units and tanks deployed in some places and a helicopter that supervised the movement of the demonstrators from the air.
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An AFP journalist also heard hospital staff discussing Bouteflika's presence on HUG's eighth floor, where the VIP wing is located, and there was a large deployment of police outside the hospital on Friday.
Algerians desperate for jobs and angry at unemployment, corruption and an elderly elite seen as out of touch with the young have taken to the streets since February 22 to protest the 82-year-old's plans to seek a fifth term in an April 18 election.
Mr Bouteflika later released a statement saying that he would step down early if re-elected - but this has not placated the demonstrators.
He has warned that the protests could plunge the country into "chaos". His campaign manager told El Khabar on Thursday that his health raised "no concerns". On Wednesday the hospital said it has been bombarded with calls about the president.
Major demonstrations were reported in other cities across the country by security sources, Algerian media and social networks.