BRUSSELS—The European Union should consider imposing more sanctions on Belarus because Minsk is flying in immigrants from abroad to send them illegally into the bloc, Lithuanian Foreign Minister Gabrielius Landsbergis said on Monday. His government accuses Belarusian authorities of sending hundreds of mainly Iraqi illegal immigrants across the border into Lithuania, an EU member state. Lithuania began building a 550-kilometer (320-mile) razor wire barrier on the border with Belarus on Friday, a move that EU foreign ministers were due to discuss in Brussels. “When refugees are used as a political weapon … I will talk to my colleagues in order for the European Union to have a common strategy,” Landsbergis said as he arrived for the meeting. He suggested the immigrants were being used as a means of pressure on the EU, which has imposed a series of sanctions on Belarus since a disputed presidential election last August that was …