Zagreb: Croatian demining experts have been sent to a border area where migrants began crossing on foot from Serbia on Wednesday, called in by police concerned at the threat posed by minefields left over from Croatia's 1991-95 war.

"Police have contacted us and we sent a team to the border area in eastern Croatia," an official at the Croatian Demining Centre said, asking not to be named.

A file photo of a vs-50 landmine. Croatian demining experts have been sent to a border area to ensure landmines areas are clearly marked where migrants began crossing on foot from Serbia Credit:Penny Bradfield

The government said the demining experts, already operating on demining activities in eastern Croatia, had been sent with police to verify if all the minefields were properly marked.