Turkish police have fired into the air to disperse a protest march in mainly-Kurdish southeast Turkey, killing one person. In Istanbul, three people were reported killed after a molotov cocktail was thrown at a bus. Security sources said additional troops were being deployed to Kiziltepe on Sunday, a town of about 100,000 people south of the region's main city of Diyarbakir. In Ankara, parliament called a special session for Tuesday to discuss the violence. The southeast has suffered its worst riots in many years since Tuesday's funeral of 14 armed separatists killed in clashes with the army. Tensions reflect discontent over local conditions and resurgence of a Kurdish guerrilla campaign. Police said Mehmet Sidik Onder, 22, received a bullet wound to the stomach after police fired in the air to stop a march in Kiziltepe, near the Syrian border. The protesters were heading for the home of another man shot dead in the town on Saturday. Witnesses said the police fired at the man, the ninth to die in a wave of unrest that could stir serious strains in Tayyip Erdogan, the prime minister's, ruling Justice and Development Party and stoke tensions with the influential military. Events are watched closely by the European Union that Turkey seeks to join.