The bomb went off as a funeral procession for a Sunni tribal leader in the town of Wajihiyah passed by, China's state-run Xinhua news agency reported.
"The latest reports said 10 mourners were killed by the blast and 45 wounded, including 13 in critical condition," a local official said.
On Saturday night, the tribal leader's son was killed when a bomb was detonated inside his car, Xinhua reported.
Notable deaths of 2014 [PHOTOS]
Syrian Al Qaida group executes Lebanese soldier