The 190 meter long, 39768 dwt tanker Santa Ana suffered an explosion while undergoing repairs at Bremerhaven, Germany.   The explosion  in the engine room injured 11 people who suffered burns or broken bones.  Three workers suffered severe burns and were flown to nearby hospitals.   The workers and crew closed off entrances to the engine room and engaged the CO2 fire suppressing system preventing the fire spreading to other sections of the vessel.   The local fire brigade arrived and quickly extinguished the blaze.