Four democracy activists have been executed by Myanmar's military in what is believed to be the first use of capital punishment in decades.

The four - including activist Ko Jimmy and lawmaker Phyo Zeya Thaw - were accused of committing "terror acts".

They were sentenced to death in a closed-door trial that rights groups criticised as being unjust.

Family members of the deceased gathered at Insein prison on Monday desperate for information on their loved ones.

The mother of Zayar Thaw says she was not told when exactly her son would be executed, adding that she was unable to make proper traditional funeral plans as a result.

"When we met on Zoom last Friday, my son was healthy and smiling. He asked me to send his reading glasses, dictionary and some money to use in prison, so I brought those things to the prison today," Khin Win Tint told the BBC's Burmese Service. "That's why I didn't think they would kill him. I didn't believe it."