KIRKUK, Iraq (CBS) -- At least two people were killed and four others wounded in a car bomb attack in the ethnically-mixed city of Kirkuk, 250 kilometers (155 miles) north of Baghdad, on Tuesday, police said.
They said that the blast took place near a headquarters of the Kurdistan Democratic Party (KDP) led by President of Iraq's Kurdistan region Massoud Barzani.
Two separate blasts hit the predominantly Kurdish area of Shurja in the city centre.
"This is an unbearable situation and this is not the first time, if there is a government such attacks should not happen. When shall we live in safety and be rid of the violence?" said one witness.
"Police forces are everywhere, but they cannot protect us. What is the fault of those people who were killed in the attack? The children were killed and the houses were destroyed - why?" he asked.
The oil-rich city of Kirkuk is home to a volatile mix of Arabs, Kurds and Turks.
Baghdad and Iraq's autonomous Kurdistan region earlier this week began sending troops to an area over which they both claim jurisdiction, raising tensions in a long-running feud over land and oil rights.