WARSAW, August 28. /ITAR-TASS/. Poland should reconsider its relations with Russia, Polish Foreign Minister Radoslaw Sikorski said on Thursday.

"We need solutions, we need the revision of relations with Russia," Sikorski said. "However, our sanctions may have only mid-term effect while Ukraine is seeking immediate help," the minister added.

"We must act vigorously but reasonably as we are facing unpredictable consequences," he said.

Sikorski described the crisis in eastern Ukraine as "Europe's most serious security crisis over the past decades".