In 2021, the Union Home Ministry increased the jurisdiction of the Border Security Force (BSF) in certain states. Statement 1 is correct; the operational jurisdiction in Punjab, West Bengal, and Assam was extended from 15 km to 50 km from the international border. Statement 2 is correct; BSF personnel are empowered under the Code of Criminal Procedure (CrPC) and other relevant acts (like Passport Act, NDPS Act, Customs Act) to carry out search, seizure, and arrest within their area of jurisdiction. Statement 3 is incorrect; within their designated jurisdiction, BSF personnel have the power to arrest in addition to search and seizure. Statement 4 is partially correct that BSF has search powers in those states, but it doesn't accurately reflect the increase in power and mixes states with different jurisdiction limits (50km in Punjab, WB, Assam, 80km in NE states and Ladakh). The question specifically asks about 'increased powers', which refers to the change from 15km to 50km in the mentioned states.