Ukraine's acting president, Oleksander Turchinov, has cancelled a trip to Lithuania scheduled for Monday to deal with separatist protests in the eastern Ukraine towns of Donetsk and Luhansk. Pro-Russian protesters seized a regional government building and state security offices. They want a referendum like Crimea to determine whether to stay in Ukraine or join Russia. The statement said Turchinov was holding an emergency meeting with the heads of security services.