Three Polish border guards were killed when their helicopter crashed on the Belarussian side of the border, fire-brigade rescuers said on Sunday, Reuters reported.
"The wreckage of a border-guard helicopter that disappeared last night with three officers on board was discovered on Sunday morning in Belarus some 200 metres (yards) from the (Polish) border," PAP news agency reported regional fire-brigade spokesman Marcin Janowski as saying.
PAP said the cause of the accident, which occurred during a routine patrol of the border in the north-eastern corner of Poland, was not immediately known.