A KNLA commander, speaking from the besieged Wah Lay Kee camp, said one KNLA soldier had been killed and three wounded.
But casualties have been greater for the Burma Army and its ally, the Democratic Karen Buddhist Army.
The commander said his soldiers had counted seven dead and 33 wounded since the latest hostilities began on April 12, a Sunday afternoon.
Land mines have caused the greatest casualties and booby traps laid around the camp.
The combined Burma Army and DKBA force of about 250 men has used scores of mortars, both 69mm and 81mm.
On Tuesday afternoon at about 3pm a commander at the camp said the latest bombardment had occurred about 25 minutes earlier and the situation “is not good, they are attacking us every day”.
The KNLA soldiers have long been expecting this push and have made preparations.
The whole area is live with booby traps and land mines and Karen National Union vice president David Thackrabaw said the KNLA had been making its own Claymore directional mines, primarily a defensive weapon but deadly to a range of 250 metres.
Wah Lay Kee, home to the KNLA’s Sixth Brigade 201st division, although a literal stone’s throw from the Thai border is pretty much isolated, with Thai soldiers maintaining a heavy presence along potential access routes.
Daniel Pedersen Mae Sot
CASUALTIES mounted on both sides this afternoon as an intense push to take a Karen National Liberation Army encampment close to the Thai border by the Burma Army and an allied militia stretched into its ninth day.