The battle involved as many as 150 members of the Abu Sayyaf group, according to the military, which also reported militant deaths that could not be verified.
A total of 26 Abu Sayyaf fighters were slain, Tan said but the military was unable to recover their bodies.
"The populace of the area, they confirmed it. They were buried at once according to Muslim tradition. Others were seen by our troops, being shot, falling and not getting up," he told AFP.
The rest of the Abu Sayyaf members fled in different directions before dawn on Sunday, he said.
Sixteen Abu Sayyaf fighters were also wounded along with 14 soldiers before the IED blast on Sunday, Tan added.
Pursuit operations were continuing against the remnants of the Abu Sayyaf group and its leaders in Basilan, he said.
The captured camp, measuring 30,000 square metres (323,000 feet) could accomodate about 250 people with 28 structures including fortified bunkers, the military said.
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