The blast took place on Tuesday in a forest near the southern Polish town of Kuźnia Raciborska, as soldiers from an airborne regiment stationed in the region were dealing with unexploded artillery shells discovered three days earlier.
The four injured soldiers were taken to hospital. Two of them are in a serious condition, Alina Kucharzewska, a spokeswoman for the provincial governor, was quoted as saying by PAP.
According to Paweł Mucha, the mayor of Kuźnia Raciborska, the local forests are full of unexploded ordnance, which has been a problem since World War II.
(jh/pk)
Source: PAP