Armed men burst into a hospital in central Mexico on Tuesday and killed a patient who was being treated for a previous gunshot wound, authorities said.

Prosecutors in the state of Morelos, just south of Mexico City, said the attack occurred early Tuesday in the city of Cuernavaca, the state's capital.

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The killers made their way into an intensive care unit and shot the patient to death. They fled after the attack. The victim was a 23-year-old man who had been admitted Saturday for a gunshot wound.

A Mexican flag waves in front of The National Palace, the office of the president, in Mexico City's main square, the Zocalo, at sunrise, April 24, 2023. (AP Photo/Marco Ugarte)

Killings inside hospitals are infrequent but not unknown in Mexico.

A day earlier, local media reported that an assailant disguised as a doctor had tried unsuccessfully to kill a patient with an injection at a hospital in the northern state of Sinaloa.

In 2023, hitmen stormed a hospital in the city of Culiacán, Sinaloa in a bid to kill a patient. But they clashed with other gunmen already inside, sparking a gun battle that left four people dead, including a doctor apparently caught in the crossfire.

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Gangs in Mexico have been known to try to finish off wounded rivals by attacks in hospitals or ambulances. In 2021, two paramedics were murdered while transporting a patient in the violence-plagued northern state of Zacatecas.