31 March – Bulgaria and Romania partially join the Schengen Area, allowing travel by air and sea without border checks, Austriavetoed travel by land without border checks over fears that non-EU citizens could get easier access to the European Union.[3]
31 March – Customs agents seize 403 kilograms (about 887 pounds) of heroin valued at 8.5 million euros ($9 million).from a truck traveling from Iran to Western Europe at the Kapitan Andreevo border crossing with Turkey.[4]