Mystery over Dutch WW2 shipwrecks vanished from Java Sea bed Three Dutch World War Two ships considered war graves have vanished from the bottom of the Java Sea, the Dutch defence ministry says. All three were sunk by the Japanese during the Battle of the Java Sea in 1942, and their wrecks were discovered by divers in 2002. A report in the Guardian says three British ships have disappeared as well. The British government says it is "distressed" by the reports and is investigating. A new expedition to mark next year's 75th anniversary of the battle found the wrecks missing. The Guardian says it has seen 3D images, showing large holes in the seabed where HMS Exeter, HMS Encounter, the destroyer HMS Electra, as well as a US submarine, used to be. (...) http://www.bbc.com/news/world-asia-37997640 Steel of sunken WW1/WW2 ships is in high demand as it is less radioactive, that's important to build calibrated instruments. There are plans to salvage sunken German WW1 and WW2 ships and submarines because of that. So most likely scrap metal pirates did it.