announcer: live from cnn center, this is cnn newsroom with robyn curnow. despite condemnations from the u.n. and major world powers, myanmar s military crackdown on protesters is only getting bloodier and more dangerous. a human rights group says as least 38 demonstrators were killed on sunday. it is the deadliest day so far since last month s coup. and there could be more deaths we just don t know about. the military junta has now declared martial law in six districts of yang orngs which is myanmar s largest city. i want to go straight to our paula hancocks who s been monitoring all of these latest developments and of course this increase in violence on the streets against protesters. what more can you tell us? hi, paula. reporter: well, robyn, it s very clear to everybody that the level of force that security forces are now using against protesters is increasing. it is definitely on the rise. as you say, yesterday being the deadliest day so far that we know of since