A suicide car bomber ploughed into a convoy carrying employees of a British company in northern Iraq on Monday, killing four of them and wounding five Iraqi civilians, Iraqi security officials said.
The suicide bomber targeted the last vehicle of the convoy in restive Mosul and the force of the blast threw the armoured vehicle 40 metres into a ravine, killing everyone inside, police said.
"I saw the other members of the convoy bring out four dead foreign civilians from the smashed car," an Iraqi military officer, asking not to be named, said by telephone from the site of the attack in northern Mosul.
Iraqi officials said the firm was a British construction company but its name was not immediately known and there was no independent confirmation.
The British embassy said it was checking reports that a British national was among the dead. "We stand ready to provide consular assistance where possible," a spokeswoman said in an e-mail.
The nationalities of the other dead foreigners were not immediately known.
Mosul is on the front line of a longstanding feud between Iraq's Arabs and minority Kurds over land, power and oil wealth.