Polish President Aleksander Kwasniewski has urged Russian authorities to find and punish those responsible for a string of attacks on Polish citizens in Moscow.
In a statement addressed to his Russian counterpart Vladmir Putin Friday, President Kwasniewski said the attacks, for which Russia has expressed regret, are increasing tensions and hostility between the two neighbors.
Two Polish diplomats required hospitalization after unknown attackers beat them in separate incidents, Sunday and Wednesday, near the Polish embassy.
A Polish journalist said he was attacked as he walked home in Moscow Thursday.
These incidents came after thugs attacked three children of Russian diplomats in Warsaw on July 31. Poland expressed regret, but rejected Moscow's call for an apology, saying it was a "criminal act."
Russian-Polish relations have been strained in recent years by issues ranging from Poland's joining NATO to calls for political change in parts of the former Soviet Union.
Some information for this report provided by AFP and AP.