MOSCOW, December 25 (RAPSI) – All 30 Greenpeace activists detained over a protest staged in September at a Russian Arctic oil rig have been summoned to the Russian Investigative Committee, Greenpeace wrote on its Twitter account.

According to the statement, the activists will allegedly receive orders of the closing of their cases pursuant to a broad amnesty spearheaded by Russian President Vladimir Putin and adopted by the State Duma earlier this month.

Last week, Russian President Vladimir Putin did not rule out the Greenpeace Arctic Sunrise crew may be pardoned pursuant to the amnesty.

The first Greenpeace activist pardoned under the amnesty was reportedly Anthony Perrett (UK). The case against him was dropped on Tuesday.

The Duma passed the amnesty bill, which was originally submitted by President Putin, in its first reading.  It was arranged to coincide with the 20th anniversary of the Constitution of the Russian Federation. It has entered into effect, having been published in Rossiyskaya Gazeta - the governmental publication that prints all bills after they have been approved.

The Arctic Sunrise ship was seized by Russian border guards on September 19 in international waters, within Russia's exclusive economic zone, a day after two Greenpeace activists scaled the Prirazlomnaya drilling rig in the Pechora Sea, the southeastern part of the Barents Sea.

The platform, owned by Gazprom Neft Shelf, a subsidiary of Russian energy giant Gazprom, is the first ice-resistant stationary oil platform in the world set to produce offshore Arctic oil.

Greenpeace and other environmental groups oppose drilling for oil in the Arctic because they say that it is currently impossible to sufficiently clean up potential oil spills in the region, and that such drilling cannot be economically viable.