Suu Kyi, 75, has not been seen in public since she was deposed but a member of her legal team, Min Min Soe, was summoned to a police station in the capital Naypyidaw for a video meeting with her.
The KNU, one of the biggest rebel groups, took over an army base in eastern Kayin state at the weekend, prompting the military to respond with air strikes.
France condemned the violence as "blind and deadly" and China added its voice to a chorus of international concern on Monday, calling for restraint from all sides.
"The United States strongly condemns the Burmese security forces' brutal violence against civilians," US Trade Representative Katherine Tai said, using Myanmar's former name of Burma.
On Saturday night, the Myanmar military launched the first airstrikes in Karen state in 20 years, hours after a rebel group had seized a military base.
AAPP said a further 13 people were killed on Sunday, as funerals were held for some of the victims, after the deadliest day of violence in the eight weeks since the coup.
The junta on Saturday staged a major show of might for its annual Armed Forces Day as the death toll from crackdowns since the coup climbed to at least 423.
In the first acknowledgement of a shoot-to-kill order by the army, a broadcast on the MRTV news channel directed at protesters said: "You should learn... that you can be in danger of getting shot to the head and back."
Its data shows that at least 25 percent of those who were killed died from shots to the head, raising suspicions they were deliberately targeted for killing.