According to the Ministry of Defence, a LTTE suicide bomber training camp is/was located in the area (Thirivaiaru) shown in the image below. The South Asia Terrorism Portal has a fuller listing of LTTE suicide bomber attacks.
It was attacked by the Sri Lanka airforce on the 30th of July 2008. The Ministry of Defence web-site has a post with video of the attack and an all important map. For those who can’t afford the bandwidth to download it, here’s the youtube version:
The facility was built after 2006 since the Google Earth image does not show the complex of buildings in the in the video. Somebody has already marked the location on Wikimapia.
Hopefully the “facility” is what its claimed to be and not some camouflaged decoy.