(ANSA) - BELGRADE, NOV 17 - On X, Polish Prime Minister Donald Tusk stated that intelligence services believe the Sunday accident on the Polish railway between Warsaw and Lublin was deliberate sabotage. "Unfortunately, the worst-case scenario was confirmed. Sabotage occurred on the Warsaw-Lublin line (in the village of Mika). An explosive device exploded, destroying the railway tracks. On-site operations include intelligence services and the prosecutor's office. Damage was also discovered along the same line, closer to Lublin', Tusk stated. (ANSA).