The Battle of Delft was a naval battle on December 25, 2007 and part of the Sri Lankan Civil War. The Sri Lankan Navy claimed that it received reports of a boat cluster moving off of Delft Island. After moving in to investigate clashes erupted and fierce sea battle ensued. Both sides claimed to have victory. The pro-rebel Tamilnet claimed that the Sea Tigers sank one Sri Lankan Navy vessel and the Sri Lankan Navy suffered casualty. However, the Sri Lankan Defense ministry claimed that 6 Tiger boats were sunk and over 40 Tigers were killed.