17 December 2010 Last updated at 17:54 ET
Meanwhile, the Tamil Tigers used systematic forced conscription during the war, which ended in 2009.
The cables are some of 2,000 released by whistle-blowing website Wikileaks.
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US diplomatic cables newly released by Wikileaks are sharply critical of both the Sri Lankan government and the now defeated Tamil Tiger rebels.
The cables dating from 2007 suggest that the state colluded in paramilitary activities including killings, child trafficking and organised prostitution. Meanwhile, the Tamil Tigers used systematic forced conscription during the war, which ended in 2009.
The cables are some of 2,000 released by whistle-blowing website Wikileaks.
Continue reading the main story