More than 1,000 people were killed in violence and explosions in Iraq in May, marking it as the deadliest month, said the United Nations on Saturday. "That is a sad record," Martin Kobler, the U.N. envoy in Baghdad, said in a statement cited. "Iraqi political leaders must act immediately to stop this intolerable bloodshed," the statement added. The brutality in the month of May reached total of 1,045 killed and 2,397 wounded. Number of civilian deaths is 963, including local police. The total of policemen wounded reached 2,191, the statement noted. Statistics point out that "Baghdad was the worst affected province with a total of 1,817 civilian casualties - 532 killed, 1,285 injured." According to United Nations Assistance Mission for Iraq (UNAMI), several parts of Iraq have witnessed at least 563 hostile incidents including explosion of 178 improvised explosive devices that killed and wounded 886 Iraqis, in addition to 82 car bombs and suicidal attacks that resulted in 1, 435 deaths and injuries. Moreover, 242 armed clashes killed 470 Iraqis.