Moment protesters attack Northern Ireland police with petrol bombs

Hooded protesters attack Athens police with petrol bombs

Hong Kong protest: Protesters hurl petrol bombs after police fire tear gas to clear rally

Petrol bombs hurled at home of Albanian Prime Minister by opposition party protesters

Hong Kong police and protesters exchange tear gas and petrol bombs

Moment protesters in Hong Kong throw petrol bombs towards police

Protesters throw petrol bombs as Greek parliament debates

Protesters hurl petrol bombs in Hong Kong

Protesters hurl stones and petrol bombs in Northern Ireland

Petrol bombs thrown at protesters in Cairo

Prophet row: Protesters throw petrol bombs at cops in Bengal's Murshidabad

Ukrainian protesters and police light up Kiev's main square with petrol bombs and fireworks

Hong Kong protesters use arrows, catapults and petrol bombs against police

Egypt protesters throw petrol bombs at presidential palace

Bahrain - Riot police attacking peaceful Protesters June 1st in Bani Jammrah

Tear gas, petrol bombs and mass arrests on 17th straight Sunday of anti-government protests in Hong Kong

Albania protests continue as petrol bombs hurled at prime minister's office

Greek protests: Petrol bombs hurled at riot police

Watch: Petrol bombs and tear gas as Hong Kong protests turn violent

Caracas Protesters Use Makeshift Shields to Protect Against Tear Gas 'Bombs'