Activists say dozens have been killed and thousands arrested in a crackdown by the security forces, who have been accused of firing on protesters at close range, bludgeoning them with batons and other abuses.

Social media reports and rights group say Sarina Esmaeilzadeh was killed by security forces when she was struck with batons on the head during protests in morality police custody.

In Shan state, ethnic groups attacked a police station, killing at least 10 policemen.