He added that the suspects had long been operating with Russian intelligence and that one had been convicted by a court in the Ukrainian city of Lviv in May this year for sabotage. The second suspect is from the Russian-occupied Donbas region whom Tusk said crossed from Belarus into Poland together with the first suspect this fall. Two sections of the Warsaw to Lublin line, considered a strategic link between Poland’s capital and the eastern regions bordering Ukraine, were targeted by covert operations over the weekend. Tracks were blown up near the village of Mika, some 90 kilometers south of Warsaw, officials said, with local residents reporting that they heard a blast on Saturday night. Further south in the Lublin region, rails were subject to tampering and a power line was also reportedly cut. ‘Most serious incident’