Nairobi, Kenya (AFP)—At least 10 people died across Kenya and hundreds were arrested during anti-government demonstrations on Monday, a rights group and police said, following clashes between police and protesters in the capital Nairobi’s outskirts.

The Kenyan National Commission on Human Rights (KNCHR) also accused the police of cooperating with criminal gangs, as a heavy deployment of the security forces kept much of central Nairobi deserted ahead of the annual marches to mark Saba Saba Day.

Meaning Seven Seven, the demonstrations commemorate July 7, 1990 when Kenyans rose up to demand a return to multi-party democracy after years of autocratic rule by then-president Daniel arap Moi.

The KNCHR said in a statement it “had documented ten fatalities, twenty-nine injuries” across 17 counties, but did not provide any further details.

A statement from the National Police Service (NPS) late Monday put the death toll at 11, with 52 police officers and 11 civilians wounded.

From around midday, AFP saw running battles with groups of anti-riot police who fired teargas at small gatherings, with some of the crowd throwing rocks back and engaging in destructive looting.

Young Kenyans, frustrated over economic stagnation, corruption and police brutality, are once again engaging in protests that last month degenerated into looting and violence, leaving dozens dead and thousands of businesses destroyed.

Protesters accuse the authorities of paying armed vandals to discredit their movement, while the government has compared June’s demonstrations to an “attempted coup”.