Blast on section of rail line used for deliveries to Ukraine ‘act of sabotage’

Mr Tusk has vowed that Poland will catch the perpetrators, “whoever they are”

Prime Minister Donald Tusk, second right, visits the site of the rail line that was damaged by sabotage, near Deblin, Poland (KPRM/AP)

Poland’s Prime Minister Donald Tusk has said an explosion on a section of railway line used for deliveries to Ukraine was an “unprecedented act of sabotage”.

A Polish security source told The Associated Press (AP) that authorities are investigating whether the blast on Sunday on the line linking Warsaw to south-eastern Poland is connected to Russia, Belarus or their proxies.