More than 30 people were killed on Monday and another 68 were wounded when three suicide bombers blew themselves up one after another in a Baghdad market, media report said according to dpa. According to the Aswat al-Iraq news agency, the first attacker detonated a car bomb in the mostly Sunni neighborhood of Adhamiyah, and then, as people rushed to help the injured, two other attackers blew themselves up in the crowds. Meanwhile, a 13-year-old female suicide bomber killed seven tribal police members in Iraq's Baquba city, witnesses told Deutsche Presse- Agentur, dpa. The bomber detonated herself in the midst of a tribal police checkpoint in al-Atibaa street in the centre of Baquba, 60 kilometres north of Baghdad. Eight people, including civilians and tribal police, were wounded in the attack.