Italian prosecutors have pressed on with a bid to arrest 26 US Central Intelligence Agency officers over their 'grave crime' of abducting a 'terror suspect' in 2003.

Public prosecutors in Italy have called upon a Milan court to issue the arrest warrant for the CIA agents who participated in a 2003 kidnapping operation, as part of US 'renditions' of terrorism suspect authorized by former US administration, which led to the detention and 'harsh' interrogation of the Egyptian Muslim cleric Hassan Mustafa Osama Nasr, aka Abu Omar.

The Italian lawyers have also urged the court to convict the CIA agents involved in the so-called US war on terror and put them behind bars for at least 10 to 13 years for their offense.

Moreover, they have requested the court to mete out similar imprisonment term for Italy's former head of secret service, Nicolo Pollari.

Under renditions program, the US spy agency relocated suspects to a third country where torture was exercised as an attempt to outsource the afflicting practice, human rights activists say.

Armando Spataro, a leading prosecutor on the case has also accused Italian governments of failing to formally request the extradition of the US spies and said that the presence of the American 'fugitives' was necessary in order to provide more testimonies for CIA's international undercover activities.

The US government has refrained to extradite the accused 'criminals' to Italy in order for them to give evidence on Abu Omar case.

Meanwhile, CIA has so far abstained to comment on the latest tribunal against its agents.