Paramotors dropped bombs on a village in the central Sagaing region on Monday and a fighter jet conducted an air strike in Rakhine state, 320 km (199 miles) to the west of that incident a day later, killing at least two dozen people in total, Myanmar Now and the Irrawaddy reported.
The Arakan Army, a rebel group at war with the ruling junta in Rakhine state, said 17 civilians including children were killed and 14 people wounded when the jet bombed a busy village market.
Reuters has been unable to independently verify the reports and a spokesperson for Myanmar's military government did not respond to calls seeking comment.
UNICEF said it was "deeply alarmed" by the reports and urged all sides in Myanmar's conflict to uphold their obligations under international humanitarian law.
"Children and civilians are once again bearing the brunt of escalating hostilities," it said in a statement. "Ongoing clashes continue to displace children and upend their access to vital services, including healthcare, education and protection."
AIR POWER ESCALATION
Myanmar has been roiled by conflict that ignited after generals seized power in a 2021 coup, with the military battling rebels in multiple parts of the ethnically diverse country of 51 million people, which has a long history of struggles for autonomy and resistance to army rule.
About 6,800 civilians have been killed and 3.6 million people displaced in the turmoil, according to UN estimates, creating one of Asia's worst humanitarian crises, with food and aid shortages affecting 40% of the population.
The military last year significantly escalated its use of air power through conventional aircraft, drones and paramotors - crewed paragliders that seat up to three people to drop bombs on targets.
The junta rejects allegations by rights groups, the UN and western governments that it is bombing residential areas, schools and hospitals and says its operations target armed groups determined to destabilise the country.
Khaing Thu Kha, an Arakan Army spokesperson, said the military's air strikes were inhumane acts and the killing of civilians was not an unintended consequence.
"Targeting and bombing civilian sites by the military is no longer an isolated occurrence ... We have seen a high frequency of deliberate attacks on civilians," Khaing Thu Kha said.
(Reporting by Reuters Staff; Writing by Martin Petty; Editing by Kate Mayberry)

A man crosses a road on the fifth anniversary of the military takeover, in Yangon, Myanmar, 01 February 2026. On 01 February 2021, Myanmar's military seized power and declared a state of emergency, ousting the democratically elected government. The takeover sparked a nationwide civil disobedience movement and a protracted internal conflict. EPA/NYEIN CHAN NAING