Two Azerbaijani journalists and a regional official were killed in a landmine explosion Friday in Nagorno-Karabakh, officials said.

The explosion follows a series of incidents involving soldiers from Armenia and Azerbaijan along their borders that has put pressure on a Russian-brokered ceasefire ahead of elections in Armenia.

Azerbaijan’s interior ministry and the office of the prosecutor general said the blast occurred around 11:00 (0700 GMT).

“A truck was blown up by an anti-tank mine in the village of Susuzlug in the Kalbajar district, killing three civilians”, - the statement said.