Water cannon and tear gas have also been used against protesters, and one woman is in hospital with a critical head injury.
News agencies quoted doctors as saying they had seen wounds from live bullets.
Protesters are standing against a military coup that removed the elected government last week.
A ban on large public gatherings and night-time curfews has been instigated
in some cities, with military leader Min Aung Hlaing warning that no-one
is above the law. (BBC News)