Polish Foreign Minister Radoslaw Sikorski said in mid-August, after Warsaw had formally agreed to the deployment of 10 U.S. interceptor missiles on its territory, that Lavrov had cancelled his planned September visit to the country.
The Polish Foreign Ministry, however, said the next day that Moscow had not formally confirmed the cancellation of Lavrov's visit. Sikorski then backtracked on his statement, saying it was a "misunderstanding."
Russia has fiercely opposed U.S. plans to deploy elements of its missile shield in Europe, saying they pose a threat to its national security. Moscow earlier warned it would be forced to target its missiles at Poland if the former Soviet-bloc state hosted the interceptor missiles.
In early July, the U.S. also signed an agreement with Prague to place a radar station in the Czech Republic.
Polish television said Lavrov was due to meet with both Sikorski and Prime Minister Donald Tusk, who earlier said the missiles and the accompanying U.S. military aid were needed to protect the country from Russia.
Poland was also among Russia's strongest critics over last month's armed conflict with Georgia, insisting on EU sanctions against Moscow.
Moscow recognized Georgia's breakaway South Ossetia and Abkhazia as independent states on August 26, two weeks after Georgian troops launched an attack to retake South Ossetia.
Both South Ossetia and Abkhazia broke away from Georgia in the early 1990s, and had enjoyed de facto independence for many years.
