BAGHDAD (AP) — A powerful suicide car bomb struck the local headquarters for the party of a key Kurdish leader early Wednesday in the disputed Iraqi city of Kirkuk, killing at least four and wounding dozens, according to officials.

The blast outside the offices of the Kurdistan Democratic Party caused widespread damage, mangling cars and tearing apart storefronts. The KDP is led by Massoud Barzani, the president of Iraq's largelyautonomous Kurdish region, who has frequently sparred with Iraq's central governor in Baghdad.