Sudan's Humanitarian Affairs Minister has been wanted for more than a year
A group hunting war crime suspects has turned to the social networking site Facebook to try to find two Sudanese men sought for crimes in Darfur.
The War Crimes Watch List is asking Facebook users to report sightings of Ahmed Haroun and Janjaweed leader Ali Muhammad Ali Abd al-Rahman.
The International Criminal Court indicted both men a year ago on 51 counts of crimes against humanity.
The group has also used Google Earth to pinpoint their last known whereabouts.
Ali Muhammad Ali Abd al-Rahman is also known as Ali Kushayb, while Mr Haroun is Sudan's Humanitarian Affairs Minister and was previously minister in charge of Darfur.
The ICC says he helped organise the Janjaweed militia accused of widespread atrocities against the region's black African population.
Mr Haroun says he "did not feel guilty".
The conflict in Darfur has led to a humanitarian crisis
Sudan's government has denied charges it armed the Janjaweed.
The two men are on the only indictments issued by the ICC in relation to the estimated 200,000 deaths that have occurred in Darfur over the past five years.
The conflict has also led to more than 2.5 million people being displaced from their homes.
"It's a new way to send an old message," said Nick Donovan of the Aegis Trust, the organisation behind the "Wanted for War Crimes" list.
"Wanted posters can only be seen by a few hundred people at most - the internet is used by billions."
The Sudanese government has rejected the international court's jurisdiction.
James Smith, chief executive of the Aegis Trust, said: "Someone, somewhere, knows where they are. They shouldn't be allowed to live out their last days in luxury. Their future lies in a courtroom. That's what their victims deserve."