The slayings come amid an uptick of political and sectarian violence across Iraq , where more than 350 people died in acts of violence in May , according to a CNN tally . 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 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 .