Kyiv, January 25 (Interfax-Ukraine) - Security guards working at a construction site in the Holosiyivsky district of Kyiv found the body of a dead policeman on Friday evening, the Ukrainian Interior Ministry organized crime department reported.

Witnesses saw two people running away from the scene, it said.

The policeman was 27 and served at the Holosiyivsky district police department's investigations division, the Interior Ministry's main investigations division told Interfax.

"This man served as a member of a detention unit reacting to alarm actuation at guarded sites. He had come off duty and was walking home in civilian clothing when someone shot in his head," it said.

A law enforcement source told Interfax that the policeman had served not far from the base of the Berkut riot police task force and lived at a Berkut dormitory.

The Interior Ministry press service said also that protesters attacked three policemen near Independence Square in Kyiv on Friday evening, causing a knife wound to one of them.

"The captured law enforcement officials were held at the Kyiv City Administration building. The wounded policeman was later freed and hospitalized. The fates of the other two policemen are unknown," it said.

Meanwhile, the opposition denies that its activists captured policemen in the center of Kyiv and calls the Interior Ministry's statement on this account provocative. The website of the opposition party Batkivschyna posted a statement regarding the incident on behalf of the so-called National Resistance Headquarters in the early hours of Saturday.

"The National Resistance Headquarters categorically denies that such a fact took place and considers it deliberate provocation aimed at angering police and setting them against the protesters," it said.