"A bomb exploded in a restaurant in a popular market in Jisr Diyala, southeast of Baghdad, at around 8:00 pm (1700 GMT)," an interior ministry source said, saying five people died and 24 were wounded.

A hospital source confirmed the death toll, but said 25 people were injured.

Violence has diminished in Iraq since its heights in 2006 and 2007, but there are still regular attacks in the country.

In April, 126 Iraqis died in attacks nationwide, compared with 112 in March, the lowest figure since the 2003 US-led invasion that ousted Saddam Hussein.

A senior official in Iraq's foreign ministry met on Tuesday with Turkey's ambassador Yunus Demirer, the second time he has been called to the ministry in less than a month, a statement from the foreign ministry said.

The head of Iraq's department for neighbouring countries informed Demirer of "the Iraq government's objection to some activities conducted by the two Turkish general consuls in Basra and Mosul provinces that are far from their consular duties and obligations," said the statement published Thursday.

"For his part, the Turkish ambassador stressed his country's keenness on developing bilateral relations, affirming that Turkey does not have any goals or agendas harming the interests and strategic relations of the two countries," it continued.

Tuesday's meeting came amid an ongoing row between Baghdad and Ankara.

Fugitive Iraqi Vice President Tareq al-Hashemi is currently staying in Turkey while on trial in absentia in Baghdad, and Ankara has said it will not extradite him.

And last month, the two countries summoned each other's ambassadors.

At the time, Turkish Prime Minister Recep Tayyip Erdogan accused his Iraqi counterpart Nuri al-Maliki, a Shiite, of stoking sectarian tensions between Shiites, Sunnis and Kurds, and of monopolising power.

Maliki fired back, saying such comments "will damage Turkey's interests and makes it a hostile state for all."