A militant group in Iraq said Thursday that it was holding four Jordanian workers and called on Jordan's transport company to stop cooperation with US forces in Iraq, said reports reaching here from Dubai.

The following is a list of foreign hostages known or reportedly to have been killed or are still in captivity in Iraq.

2004:

April 8 -- Canadian Mohammed Rifat is kidnapped and still missing.

April 12 -- Jordanian Wael Mamduh is abducted in Basra and still missing.

April 14 -- Italian guard Fabrizio Quattrocchi is killed.

May 11 -- US civilian Nick Berg, missing since April 9, is beheaded. Militants with links to al-Qaeda claim responsibility.

June 5 -- Kuwaiti truck driver Saad Saadoun taking supplies to US troops is captured by a militant group called the Waqas Islamic Brigade.

June 7 -- Two Turks Tarkan Arikoglu and Adnan Azizoglu are seized in Falluja, with Azizoglu freed the next day.

June 10 -- Lebanese Hussein Ali Alyan is kidnapped along with two Iraqi colleagues. Their bodies are found on a road between Falluja and Ramadi on June 12.

June 17 -- South Korean Kim Sun-il is kidnapped in Falluja. He is beheaded on June 22. His captors are militants from Jama'at al-Tawhid and Jihad.

June 28 -- Al Jazeera shows footage of what it claims is the killing of US soldier Keith Matthew Maupin. There is no confirmation that Maupin is the man killed.

July 13 -- A group led by Abu Musab al-Zarqawi, with suspected links to al-Qaeda, kills one of two Bulgarian hostages Ivailo Kepov and Georgi Lazov. It threatens to kill the other within 24 hours unless US-led forces free prisoners.

July 17 -- Mohammed Omar, a Turkish oil tanker driver, is seized when his convoy of oil tanker trucks is attacked by men in four civilian cars northwest of Mosul, relatives say.

July 21 -- A military group calling itself the "Black Banners" said it has seized three Kenyans, three Indians and one Egyptian, all of whom are working for a Kuwaiti company. The group threatens to kill one hostage every three days if the company does not leave Iraq from 8 p.m. (1600 GMT) Wednesday.

July 26 -- An armed group says on a videotape they have kidnapped two Pakistanis and one Iraqi and threatens to kill the two Pakistanis.

July 26 -- A group, calling itself the Mujahideen Corps, says on a videotape that it will execute two kidnapped Jordanians in 72 hours unless their Jordanian company stops doing business with the US military.

July 28 -- Al Jazeera television said Raja Azad Khan and Sajjad Naeem, two Pakistanis held by a group threatening to kill them, have been executed.

July 29 -- A militant group seizes Somali driver Ali Ahmed Mousa and threatens to behead him in 48 hours unless his Kuwaiti firm stops work in Iraq, Al Jazeera reports.

July 29 -- Kidnappers with the "Black Banners" holding seven foreign truck drivers hostage in Iraq threaten to kill one of the Indian hostages if they receive no response to their demands.

July 29 -- A militant group calling itself the Death Squad in Iraq says it is holding four Jordanian workers and calls on Jordan's transport company to stop cooperation with US forces in Iraq.