Seoul, South Korea (CNN) A reserve soldier in South Korea has gone on a shooting spree at a military training camp in Seoul, initially wounding four colleagues before committing suicide, an official at the South Korean Defense Ministry told CNN.

One of the victims died en route to hospital.

The reservist, who is unidentified, opened fire on colleagues while receiving training at a military camp in Seoul at around 10:44 am local time (9.44 pm Tuesday evening Eastern) on Wednesday. The shooter died in an apparent suicide.

All South Korean men are required to serve two years of mandatory military service in light of strained tensions with North Korea.

After completing the military training, they are required to serve and train as reservists. Reservist training in the South Korean military includes live fire exercises at shooting ranges.