Polish Prime Minister Donald Tusk has warned of an increase in attempts to carry out sabotage against Poland.
"In recent weeks, we have arrested ten people who were directly involved in acts of disruption and sabotage," said Tusk, as reported by the news channel TVN24 on Tuesday. He did not give details of the arrests.
Tusk met Poland's regional presidents for a joint conference in Bialstok, which lies close to the border with Belarus.
The topic was Poland's current security situation, with a particular focus on problems on the EU's external frontier.
