The Southeast Asian country has been in crisis since the army seized power on Feb. 1, ending a decade of tentative steps toward democracy and triggering outrage at home and abroad and the setting up of People's Defense Forces (PDFs) to take on the military.

The DVB news portal reported the air strikes occurred as the army staged an offensive in the Pinlebu area of Sagaing in northwest Myanmar, citing residents who heard aircraft and explosions on Saturday night before phone lines and the internet went down.

A member of the Pinlebu PDF, speaking from outside the area, also confirmed by telephone that air strikes had taken place, but said there had been no casualties among his group.

"We cannot contact them due to the internet and phone lines blackout," the activist, who declined to be identified, said of his opposition colleagues.

Reuters could not independently verify any of the claims and a spokesman for the military did not answer calls seeking comment.

The National Unity Government (NUG), a shadow administration set up by ousted lawmakers and others opposed to the junta, said an arms cache including a rocket propelled grenade, small arms and shells had been seized in the fighting. It said more than 25 government soldiers had been killed.

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