NEW : Four bombings killed at least 20 in Baghdad on Saturday , two of them at wedding party . 10 also killed in Mosul , including activist shot to death , two killed by car bomb . Three bodies , apparently tortured and hanged , recovered from Tigris River in Mosul . More than 350 people killed in Baghdad in May as Sunni - Shiite discord rises .
NEW : Four bombings kill at least 20 in Baghdad on Wednesday , 16 of them at wedding party . 10 also killed in Mosul , including activist shot to death , two killed by car bomb . Three bodies , apparently tortured and hanged , recovered from Tigris River in Mosul . More than 350 people killed in Iraq in May as Sunni-Shiite discord rises .