Two protesters were killed Monday in Myanmar, witnesses said.

Shops, factories and banks were closed in the main city Yangon as part of the uprising against the country's military rulers, reports from Reuters correspondents and others said.

Facebook postings showed the bodies of two dead men in the northern town of Myitkyina. Witnesses said they were taking part in a protest when police fired stun grenades and tear gas. Several people were then hit by gunfire from buildings nearby.

One witness told Reuters two people were shot in the head and died on the spot. Three people were injured.

Police and military have killed more than 50 people to quell daily demonstrations and strikes against the Feb. 1 coup, according to the United Nations last week.

Crowds demonstrating against the coup gathered in Yangon and Mandalay and several other towns, according to videos posted on Facebook.

Protesters waved flags fashioned from women's sarongs in some places or hung them up on lines across the street to mark International Women's Day while denouncing the junta. Walking beneath women's sarongs is traditionally considered bad luck for men and tends to slow down police and soldiers.

State media said security forces were keeping a presence at hospitals and universities as part of efforts to enforce the law.

Meanwhile, reports from people inside Myanmar said troops had occupied hospitals and university campuses, and ramped up nighttime raids ahead of a nationwide strike to protest against the military coup, according to local media reports.

The military junta seized power Feb. 1. It is attempting to consolidate its control of the country in the face of mass protests and resistance to its increasingly violent rule.

One of those detained in the raids Saturday was a party official from Aung San Suu Kyi's National League for Democracy. Khin Maung Latt died while in custody, according to advocacy group Assistance Association for Political Prisoners.

"On the night of his arrest, Khin Maung Latt was tortured to death in his cell," the association said in a news release.

Khin Maung Latt had worked as a campaign manager for one of two Muslim lawmakers elected in 2020. Mourners gathered for his funeral Sunday in Yangon.