Piracy charges against jailed Greenpeace activists in Russia have been dropped and they have been charged with hooliganism instead.
Piracy is punishable by a prison term of up to 15 years in prison. Hooliganism charges can carry up to seven years in prison.
A group of 28 Greenpeace activists, a Russian photographer and a British videographer have been held since their ship, the Arctic Sunrise was seized by the Russian coast guard after protesting outside a Gazprom-owned oil rig September 18. A total of six Britons are being held.
There was no immediate comment from the Greenpeace on the latest move by Russian investigators.
The Investigative Committee said that the detainees' refusal to testify has impeded the investigation. It dismissed the Greenpeace claim that the protest was peaceful, saying it was a crime under an international law to try to seize an oil rig.
Vladimir Chuprov of Greenpeace Russia rejected the new charges, saying the activists "are no more hooligans than they were pirates" and should be freed immediately.
"This is still a wildly disproportionate charge that carries up to seven years in jail," he said in a statement. "We will contest the trumped up charge of hooliganism as strongly as we contested the piracy allegations. They are both fantasy charges that bear no relation to reality."
Mr Chuprov also dismissed the committee's warning that it may charge some of the activists with use of force against officials, pointing at Greenpeace's 42-year history of peaceful protest.
"They arrived at that oil rig in a ship painted with a dove and a rainbow," he said.