The incident took place at about 21:00 Kyiv time near the official’s home on Kudryashova street in the capital’s Solomenskiy district, TSN reported from the scene.

Valeriy Liudmirsky is reported to have gone for a walk with his dog.

As he was returning home, he was confronted by the attackers who killed the dog, and used a stun-gun against Liudmirskiy. The unidentified perpetrators then took the Ukraine Railways’ manager to an unknown location.

The investigation is under way.

Read alsoNew NABU win: Railways procurement officials detained for embezzlementUkraine’s Minister of Infrastructure Volodymyr Omelyan has said he hopes “that law enforcement agencies quickly ascertain" the official's whereabouts and "return him home safely”.

“At the same time, I am more and more worried about the situation at Ukrainian Railways,” Omelyan wrote on Facebook. “I plan on having a serious discussion with Wojtek Balczun regarding the real state of things at the company, its HR policy and the plans for reforming Ukrainian Railways.”