Number of protesters killed since Myanmar coup passes 320

Tally comes as US and UK impose sanctions on two firms that form financial lifeline for military junta'

The number of protesters killed in Myanmar since February's military coup has surpassed 320, according to the country's Assistance Association for Political Prisoners, which said its total only included documented cases and that the real number was likely to be much higher.

The latest tally came as security forces shot and killed three more anti-junta protesters on Friday. Two were killed by head shots," said a witness who saw officers open fire on protesters waving black flags in the southern town of Myeik.