An Ethiopian soldier shot a man dead in front of several people after his phone rang during a public meeting, Amnesty International says.
It is one of many incidents the rights watchdog recorded from a security crackdown in Oromia regional state at the end of 2018 and 2019.
This was the year that Prime Minister Abiy Ahmed won the Nobel Peace Prize.
He has been praised for his reforms, but they may have lifted a lid on ethnic tensions.
The BBC has tried to contact the authorities to respond to the report but they have not reacted.