A guard at a Polish prison opened fire on police Monday, leaving three officers dead and seriously injuring a prisoner, officials said.
The police officers had arrived at the facility in Sieradz in central Poland to take away an inmate.
As they were leaving, a 28-year-old guard fired at their car from a watchtower, killing two officers immediately and seriously injuring one officer and the prisoner, said Magdalena Zielinska, a spokeswoman for regional police.
The injured men were hospitalized, and the third police officer later died as a result of wounds to his chest and abdomen, said Miroslawa Kraszewska, another police spokeswoman, reports AP.
Police managed to overpower the guard following a brief exchange of fire that also left him injured in the arm. The injured prisoner was kept in a hospital.
Interior Minister Janusz Kaczmarek said reports indicated that the prison guard had family problems.
The head of the Russian Finance Ministry, Anton Siluanov, said that the Americans would suffer additional losses if they impose sanctions on Russia's public debt