A suicide bomber attacked an Israeli tour bus at Burgas Airport, Bulgaria, resulting in the military branch of Hezbollah being designated a terrorist organization by the European Union.

The 2012 Burgas bus bombing was a terrorist attack carried out by a suicide bomber on a passenger bus transporting Israeli tourists at the Burgas Airport in Burgas, Bulgaria, on 18 July 2012. The bus was carrying 42 Israelis, mainly youths, from the airport to their hotels, after arriving on a flight from Tel Aviv. The explosion killed the Bulgarian bus driver and five Israelis and injured 32 Israelis, resulting in international condemnation of the bombing.

Burgas Airport is an international airport in southeast Bulgaria and the second largest in the country. It is near the northern neighbourhood of Sarafovo approximately 10 km (6.2 mi) from the city centre. The airport principally serves Burgas and other seaside resorts of the Bulgarian south coast which attract many tourists during the summer leisure season.

Hezbollah is a Lebanese Shia Islamist political party and paramilitary group. Hezbollah's paramilitary wing is the Jihad Council, and its political wing is the Loyalty to the Resistance Bloc party in the Lebanese Parliament. Its armed strength was assessed to be equivalent to that of a medium-sized army in 2016.

Several national governments and two international organizations have created lists of organizations that they designate as terrorist. The following list of designated terrorist groups lists groups designated as terrorist by current and former national governments, and inter-governmental organizations. Such designations have often had a significant effect on the groups' activities.