Bomb attacks have killed more than 40 people in Iraq, a day after the government asked its neighbors for help in stopping the daily violence.
Police said on Sunday a suicide bomber targeted a truck carrying Shi'ite pilgrims to Baghdad after religious ceremonies in the southern city of Karbala. Officials say at least 31 people were killed.
Another bomber killed at least 10 people in eastern Baghdad when he blew himself up aboard a mini-bus as it passed near Mustansiriya University.
Elsewhere, a bomb in the northern city of Mosul killed three people at the headquarters of the country's largest Sunni political party the Iraqi Islamic Party.
At Saturday's Baghdad conference, Iraqi Prime Minister Nouri al-Maliki asked delegates to help block the networks aiding extremists inside Iraq.
Speaking on American television (NBC) today, the U.S. Ambassador to Baghdad, Zalmay Khalilzad, said five 5 Iranians arrested by U.S. forces in Iraq are not diplomats. He said they are associated with Iran's Revolutionary Guards and were providing some of the weapons coming into Iraq.