At least 33 people have been killed in bomb attacks on predominantly Shia Muslim areas south of the Iraqi capital Baghdad, officials say.

A double bombing in the city of Hilla killed 28 people and wounded scores more.

A car bomb also exploded in the nearby shrine city of Karbala, killing at least five people.

No group has said it carried out the attacks but Sunni militants have targeted the Shia majority in the past.