The security services of Russia, Ukraine and the Central Asian republics are involved in the abduction, disappearance, unlawful transfer and torture of wanted individuals, Amnesty International said in a report published on Wednesday.

"The security services of Russia, Ukraine and the Central Asian republics are colluding in the abduction, disappearance, unlawful transfer and torture of wanted individuals with a regularity that amounts to a region wide renditions programme," the report reads.

Amnesty International exposed the ease of extradition, forcible returns and removals to Central Asian states from other members of the Commonwealth of Independent States (CIS).

At the same time, when the handover of wanted individuals is obstructed, for example by the intervention of the European Court of Human Rights, "cynical subversions of international law are employed to secure the transfer," the organization said.

"Twenty years after the break up of the Soviet Union, old collegiate ties, common institutional cultures and the shared perception across the region of the threat from Islamist extremist groups bind together the successor institutions to the Soviet KGB," John Dalhuisen, Amnesty International's Europe and Central Asia Programme Director, said.