MURMANSK, October 28 (RAPSI) - Four Greenpeace activists detained in Murmansk over the Gazprom drilling platform raid in the Pechora Sea have been charged with hooliganism, Greenpeace's spokesperson Yulia Pronina told RIA Novosti on Monday.

Sea cook Ruslan Yakushev was charged on Monday. Two other activists from Russia (Andrei Allakhverdov and Yekaterina Zaspa) and Gizem Akhan from Turkey were charged earlier. Moreover, piracy charges against them have not been dropped, Pronina said.

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.

On October 9, investigators found drugs aboard the ship.

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.