The attacks came hours after US Vice President Joe Biden arrived in the Iraqi capital for meetings with Iraqi Prime Minister Nuri al-Maliki and other top officials.

One bomb exploded near the Husseiniya Shia mosque in the Karrada neighbourhood of central Baghdad, killing one person and woundibng four others, the official said.

Another went off near the Abdel Qadir Gilani Sunni mosque, also in central Baghdad, killing one person and wounding five more.

And a third bomb exploded near Al-Assaf, a Sunni mosque in Adhamiyah in the north of Baghdad, wounding four people.