UNITED STATES (VOP TODAY NEWS) – Three students were killed in a landmine explosion in the region, which has seen heavy fighting between separatists and Ukrainian troops, separatist authorities in eastern Ukraine said on Sunday.

The three children are studying at one school in the town of Horlefka, which is controlled by separatist forces between the ages of 13 and 15, according to Ivan Horodka, mayor of Horlefka, on social networking sites.

A fourth student, aged 10 years, was injured in the explosion and was being treated in a hospital as a result of shrapnel.