There are reports that four aid workers have been kidnapped in Iraq.
Canadian foreign ministry official, Dan McTeague, said two Canadians, one British citizen and one US citizen had been abducted.
He gave no details of the abductions, and also declined to reveal the aid organizations of the four.
The humanitarian workers are thought to have been snatched from a violent neighbourhood of western Baghdad.
It is not known exactly how many foreign aid workers remain in Iraq, but their number has been sharply reduced by a series of high-profile kidnappings of foreign charity workers in the country.
Irish-born aid worker Margaret Hassan was kidnapped in October 2004 on her way to work in Baghdad.
The leader of CARE International's Iraq operations was reported to have been executed by her captors a month later. Her body has never been found.
Former Iraqi PM comments on human rights abuse
The former Iraqi Prime Minister, Iyad Allawi, has said human rights abuse in Iraq is as bad now, if not worse, as it was under the rule of Saddam Hussein.
Mr Allawi's remarks come two weeks after US troops discovered around 170 Iraqi detainees who were being tortured and starved at a centre run by the interior ministry in Baghdad.
Mr Allawi was ousted as Prime Minister in Iraq's first elections in January and has since formed a coalition to contest next month's parliamentary elections.
