The deaths of two anti-coup protesters in Myanmar sparked fresh UN condemnation of the country’s new military regime on February 21, as mourners prepared for the funeral of a young woman who became a national symbol of resistance to the junta.

Authorities have gradually ratcheted up their tactics against a massive and largely peaceful civil disobedience campaign demanding the return of ousted civilian leader Aung San Suu Kyi.

February 20 marked the deadliest day yet in more than two weeks of nationwide street demonstrations when security forces fired upon a rally in Mandalay, sending the crowd fleeing in fear.

UN secretary-general Antonio Guterres condemned the use of “deadly violence” in the melee, which emergency workers said had killed one teenager and wounded dozens more.

“The use of lethal force, intimidation & harassment against peaceful demonstrators is unacceptable,” Guterres wrote on February 21.

The confrontation began when security forces in Mandalay, the country’s second-largest city and cultural capital, attempted to raid a shipyard and detain port staff on strike to protest the army takeover.

Medical rescue workers said the troops used live rounds, rubber bullets and tear gas against a crowd of people who had started flinging rocks in an effort to stop the arrests.

“Two people were killed,” said Hlaing Min Oo, the chief of a Mandalay-based volunteer emergency rescue team.

Another emergency worker on the scene, who asked not to be named for fear of reprisals, confirmed the death toll.

Graphic video circulated on Facebook showing a teenaged victim, splayed on the ground and bleeding from his head as a bystander placed a hand on his chest to feel for a heartbeat.

Hlaing Min Oo said another 30 were wounded, with half of the injuries from live rounds.

Local media reported more than a dozen people were arrested after the clash.

One resident said: “They beat and shot my husband and others.

“He was standing on the side and watching the protest but the soldiers took him away.”

Myanmar emerged from its seventh consecutive overnight internet blackout on February 21, a measure imposed by the junta after neighbourhoods mobilised watch groups to guard against evening arrests.

A funeral was to be held in the capital Naypyidaw for a young protester who died on February 19 after being shot in the head during a rally last week.

Mya Thwate Thwate Khaing, who turned 20 on February 18 as she lay unconscious in a hospital bed, has since become a potent symbol of the campaign against military rule.

Demonstrators have hoisted her photos high on street marches and unfurled a huge banner of artwork from a bridge in Yangon depicting the moment she was shot.

Vigils for the grocery store worker were held across the commercial hub on February 20, with protesters lighting candles and laying roses by a banner with her picture.

Hundreds arrested

Much of Myanmar has been in uproar since troops detained Suu Kyi on February 1, with massive street demonstrations seen in major cities and isolated villages across the country.

The new junta has so far remained impassive in the face of relentless international condemnation, with the US, Britain and Canada all unveiling sanctions targeting the country’s top generals.

EU foreign ministers will meet on February 22 to discuss their own measures against the regime.

The bloc’s foreign policy chief Josep Borrell urged security forces to “immediately stop violence against civilians” on February 20 after the violence in Mandalay.

Nearly 570 people have been detained since the coup, according to the Assistance Association for Political Prisoners monitoring group.