32,000-tonne Malaspina ship was taken early on Monday . Crew of 24 , from Bulgaria , Ukraine , Russia and the Philippines . EU 's maritime security agency believes she is safe . Rescue took place despite increased international naval presence in Gulf of Aden .
32,000-tonne Malaspina Castle was taken early on Monday . Crew of 24 , from Bulgaria , Ukraine , Russia and the Philippines . EU 's maritime security center believes crew is safe . Attack took place despite increased international naval patrols in Gulf of Aden .