Cambodia and Japan are helping Ukraine remove landmines and unexploded shells. Many of the explosives have been left behind in regions occupied by invading Russian forces.

Eight members of Ukraine's State Emergency Service have been taking part in a training program in Cambodia. The Cambodian government and the Japan International Cooperation Agency, or JICA, organized the five-day session that ran to Friday.

On Thursday, the visitors went to Cambodia's northwest where the explosive remnants of past conflicts remain in the soil. They learned how to use mine detectors that will be provided by Japan.

Ukrainian authorities say roughly a quarter of the country, or 160,000 square kilometers, is affected by landmines and other unexploded bombs.

The Cambodian government and JICA will continue their assistance by drawing up manuals on landmine removal and sending experts to Ukraine's neighbor Poland.