Somali piracy

When enemy combatants are captured during a war, they are imprisoned without trial until peace returns. Would it be possible for the UN to develop a n analogous legal regime under which Somali (or other) pirates captured under arms could be similarly held without trial in a designated territory until the piracy operations are declared at an end, or for ten years, whichever is the less? See http://ind.pn/HnTO9B