In the mid-2000s, all three victims - Ali Ibrahim, Abu Abdullah and Hassan Jabbar were on the surveillance radar of the intelligence services.
Hassan was the first one to have an encounter with PET in 1997. As a volunteer cleric active with charities through his local mosque, he naturally had to deal with the Danish authorities.
He says, he was followed by PET officers on the streets of Copenhagen and was asked to come in for a "chat", which he refused to do.
In 2006, PET approached Ali Ibrahim with a proposal to become an informer for the agency; he refused.
Abu Abdullah was approached several times and interrogated in Denmark as well.
It was also in late 2006 that PET recruited Morten Storm to spy on the Muslim community in Denmark.
THREE DANISH MEN DISAPPEAR IN LEBANON