From December 1 to 4, Military Region 7 organized a defensive combat exercise in harsh weather conditions and complex terrain.

At the National Shooting Range Area 3 (Xuan Tam Commune, Xuan Loc District, Dong Nai Province), at 20:27 on December 2, while carrying out the task of transporting explosives to the assembly location, there was heavy rain and thunder, the working group consisting of a number of soldiers from Battalion 17, Division 5, Military Region 7 paused for a break. Suddenly, the explosives exploded, causing many soldiers to be injured or killed.

As soon as the incident occurred, the unit commander promptly arrived to handle it according to regulations. The total number of missing soldiers is 12, and most of the soldiers' bodies have been found. The unit is still searching. The initial cause was determined to be lightning striking the detonator, causing the electric detonator to detonate, causing the explosive to explode.

The Ministry of National Defense has directed the Military Region 7 Command to direct agencies and units to urgently organize crime scene investigation, search for victims, and investigate the incident; at the same time, coordinate with local Party committees and authorities to encourage and share the pain and loss of the families of soldiers and carry out policy work for the wounded and dead comrades. This is a great loss that cannot be compensated for the unit, families, relatives, comrades and teammates.

Authorities are continuing to cordon off the scene and investigate the incident. Authorities will continue to update and provide further information when available.