(ANSA) - ROMA, SEP 14 - Polish Foreign Minister Radosław Sikorski said that the Russian drone incursion into Polish airspace last week was an attempt by the Kremlin to test NATO's reaction with gradual escalations, without provoking a full-scale response. He told the Guardian during his visit to Kiev on Friday.Sikorski confirmed that although the drones used in the raid were capable of carrying ammunition, those that reached Poland were not loaded with explosives. "Interestingly, they were all ineffective, which suggests to me that Russia tried to test us without triggering a war," Sikorski said. (ANSA).