Here is a concise original summary based on the information published by the source. Poland Beefs Up Security at Border With Russia The New York TimesPoland launches major border operation as activity in Russia fuels concern over possible "serious provocation" CBS NewsTusk says Poland thwarted possible provocation on Kaliningrad border overnight ABC News - Breaking News, Latest News and VideosPoland launches operation along Russian border in response to reports of planned sabotage Notes From PolandPremier Tusk Says Poland Foiled Possible Provocation at Russia Border Bloomberg.com For the full context and any later updates, use the original source link.