A deadly riot broke out in a prison in Colombia's capital, leaving 23 inmates dead, authorities said Sunday, as tensions rise over the spread of COVID-19 in one of the most vulnerable locations: crowded, poorly kept penitentiaries.

Justice Minister Margarita Cabello described the events at the La Modelo prison in Bogota as an attempted prison escape, but advocates for inmates said officials had cracked down on inmates staging a peaceful protest over conditions they feared would exacerbate infections with the virus.

“Today is a sad and painful day for the country,” Cabello said.

The conflict at La Modelo, which houses both suspects and convicts of crimes ranging from burglary to drug trafficking, began late Saturday evening. Inmates shared videos online showing people outside their cells, yelling as shots rang out in the distance.

“They have us abandoned here!" one inmate exclaimed. “They have us like dogs.”

On Sunday, evidence of the violence was still visible: The body of one man lay face-up on a roof, dressed in bright blue shorts, white sneakers and a bloody gray sweatshirt. Family members, many wearing protective masks, gathered outside, clamouring for information.

“We're desperate because we don't know anything,” one woman cried.

Authorities did not provide a detailed account of how the inmates died, saying only that seven jail workers had also been injured, two critically. Cabello said no inmates had escaped and that to date, none had been diagnosed with COVID-19 either.

“This was a criminal attempt to escape that was thwarted,” she said in a video statement.

Jhon Leon, director of Judicial Solidarity, an organization that works to improve inmate conditions, said prisoners had planned a nationwide protest Saturday evening after complaining about the dire state of jails for two weeks without getting a reply.

The National Prison Movement, a group of inmates and their relatives, released a statement earlier in the week, saying Colombia's prisons don't have enough doctors and nurses on staff, nor sufficient medicines to treat basic illnesses.

“Those deprived of liberty raise our voices in rejection of the policies and ineffective actions that have been taken,” the group said.

Leon said about 5,000 people housed in the jail, some of whom are kept six to a cell while others sleep in hallways. Prisoners want elderly inmates and those with pre-existing conditions to be moved to other locations and be put in isolation, he said. They also want more information on whether any inmates have been tested for COVID-19.

“This was a peaceful protest,” Leon said.

“The response of authorities was overhanded."

Colombia had confirmed 231 COVID-19 cases and two deaths as of Sunday. But with notoriously overcrowded and often violent prisons, many are concerned that the virus could spread quickly there.

In Brazil, hundreds of prisoners from several facilities in Sao Paulo state have escaped in recent days while family members of opposition activists jailed in Venezuela say they fear for their loved ones amid unconfirmed reports that four police officers at the country’s most notorious jail for political prisoners have come down sick with the illness.

In the U.S., authorities across the country have been ordering the release of non-violent offenders and restricting the number of new detainees to prevent spread of the disease. -- AP