The violence started Saturday when inmates seized control of three prisons in apparently coordinated riots, taking 43 guards hostage. The gangs were demanding privileges for their members and leaders, according to authorities. Shortly after police liberated one prison Sunday morning, suspected gang members attacked police across the capital.

Officials said late Monday a tenth police officer died following the attacks.

Police honored the fallen officers in a ceremony Monday, where flag-draped coffins sat in the Interior Ministry, the AP reported.

Meanwhile, the government gazette published Monday Arevalo’s declaration of a 30-day state of emergency, saying there were “coordinated actions by self-named maras or gangs against state security forces, including armed attacks against civilian authorities.”

Among the rights that the declaration limits are freedom of action and demonstrations. It also allows police to arrest people without a judicial order if they are suspected gang members. Security forces could also prohibit the movement of vehicles in certain places or subject them to searches.

The unicameral Congress approved the state of emergency with minor changes Monday night on a vote of 149 in favor to 1 against, with 10 absent or on approved leave of absence. However, it had gone into effect Sunday.