Copenhagen - A Danish district court on Tuesday convicted two men of planning a terror attack and manufacturing explosives.
The two, aged 22 and 21, were arrested in September 2007 in Copenhagen.
During the proceedings it emerged that the Danish security intelligence service (PET) had kept them under surveillance for several months.
The PET had been tipped off that the older suspect had visited an alleged al-Qaeda camp in Pakistan and installed a secret camera in his flat. The men's phone conversations were also tapped.
Police also seized a hand-written manual that bomb experts said described how to make explosives.
The men allegedly tried to make the explosive triacetone triperoxide (TATP).