Hundreds of buildings were damaged or looted, including schools and hospitals, in a wave of unrest after Daniel Chapo was confirmed as the winner of the presidential election.

Violence that engulfed Mozambique after the country’s highest court confirmed ruling party presidential candidate Daniel Chapo as the winner of disputed Oct. 9 elections has killed at least 21 people,

Mozambique’s Oct. 9 presidential election was won by the ruling party candidate Daniel Chapo with 65% of the vote, the country’s top electoral court ruled, slightly reducing his initially-reported support while still leaving him the clear winner.

A ruling on Monday confirming that Daniel Chapo had won a disputed election has sparked protests and violence.

The prisoners took advantage of ongoing political unrest triggered by disputed poll results, police say.