Altinozu, Turkey (CNN) -- Mazen Hajisa has a secret. Amid the olive groves of Turkey just a stone's throw away from the Syrian border, he has hidden away several Styrofoam boxes. Their contents are deadly: a dozen unexploded antipersonnel mines. He took one out and brushed dirt off its green molded plastic case. It was about the size of a soup bowl and stamped with Cyrillic letters. Hajisa pointed at a raised black cross on the top of the device. "If you put pressure on this trigger," he said, "It will explode." Hajisa's deadly stash of booby-traps are just a fraction of more than 300 similar devices he claimed he and several other Syrian volunteers dug up from the border between Syria and Turkey over the last two months.
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Syria began mining its border with Turkey a few months ago, Hajisa says
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Mazen Hajisa says it's his duty to help refugees flee the Syrian regime
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Rami Bakour's foot was blown off by a mine explosion
"I didn't know there were land mines," he said, while recalling the fateful afternoon earlier this month, when he tried to flee with his family across the border to @placeholder.