More than 1,600 members of military, police and civil security forces of Serbia, Romania and Bulgaria participated in the exercise which began on June 25.
The aim of the exercise was training the security forces to react in case of terrorist attacks, ecological accidents and natural disasters.
All three services of the Serbian Army - infantry, aviation and river fleet, members of the Serbian Ministry of Interior and civil security sector took part in the exercise.
Presidents of Serbia, Bulgaria and Romania Boris Tadic, Georgi Parvanov and Trian Basescu watched the principal part of the exercise from the Romanian ship "Mures".