The woman, whose identity has not been released, was charged with murder as well as a charge under the country's immigration code that applies to any foreign national who commits a crime in Myanmar, according to one of the attorneys.

It was not clear whether she entered a plea or had legal representation during the hearing in Kamayut Township Court. She faces the possibility of a sentence ranging from 10 years in prison to the death penalty if she is convicted of murder.

The U.S. Embassy in Yangon, Myanmar in 2021. Photo by AP

Both lawyers spoke on condition of anonymity to avoid possible repercussions from authorities in Myanmar's military-run government.

The diplomat was found dead on May 11 at the Sakura Residence & Hotel, a facility popular with diplomats, business people and other international visitors that is about 1.5 km from the American Embassy, according to one of the attorneys. He had suffered stab wounds to the head and neck.