Campaigners from Greenpeace have boarded a ship delivering coal to the Kingsnorth power station in Kent.
Greenpeace campaigners who boarded a ship delivering coal to Kingsnorth power station have ended their protest.
The vessel was targeted as it sailed up the River Medway, with reports of people swimming in front of the ship to stop it docking.
The vessel was targeted as it sailed up the River Medway in Kent.
The group, which is protesting against coal-fired power stations, climbed aboard from inflatable speedboats.
The group, protesting against the building of a replacement coal-fired power station on the site, climbed aboard from inflatable speedboats.
However, Kent Police said the vessel still managed to dock at Kingsnorth with some protesters still on board.
Four people came down from the foremast after being served with an injunction. Six other protesters were arrested earlier.
Six people have been arrested and four remain on the vessel, officers said.
Protester Sarah Shoraka, 31, speaking just before leaving the freighter at 1830 BST, said: "We climbed onto this ship, and stayed onboard throughout the night and all day, because coal is the most climate-damaging fuel known to man.
Protesters are being held on suspicion of conspiring to commit criminal damage and having an unauthorised presence on a ship.
"If we keep burning coal, we can't beat climate change.
Earlier, officers also said a woman was being held on suspicion of endangering an aircraft.
"But Ed Miliband's new policies would still allow E.On to build the dirtiest new power station in Britain for 30 years."
'Dangerous environment'
Assistant Chief Constable Gary Beautridge said their actions put lives at risk
Assistant Chief Constable Gary Beautridge said: "Clearly we are dealing with a difficult and potentially dangerous situation."
All 10 protesters are being questioned by Kent Police.
He said the situation had been contained and police were on board the ship.
They are being held on suspicion of conspiring to commit criminal damage and having an unauthorised presence on a ship.
He added: "This is a working coal-carrying vessel and clearly a dangerous environment for anyone who hasn't been trained to work in it.
"Therefore we are monitoring the protesters' actions from a safe distance in order to minimise the risk to life."
Mr Beautridge said a number of protesters' ribs (rigid inflatable boats) were in the water at Kingsnorth and were also being monitored from a safe distance.
The ship was boarded at about 2250 BST on Sunday as it approached the power station near Hoo.
The ship was boarded at about 2250 BST on Sunday as it approached the power station near Hoo.
A Greenpeace spokesman said campaigners were aiming to try to hold their position for as long as they could to prevent coal from being unloaded.
It managed to dock at Kingsnorth despite the action of the protesters.
We will stay as long as we can to stop the coal being unloaded Campaigner Sarah Shoraka
Speaking earlier, Assistant Chief Constable Gary Beautridge said: "This is a working coal-carrying vessel and clearly a dangerous environment for anyone who hasn't been trained to work in it."
Emily Highmore, a spokeswoman for E.ON which owns Kingsnorth, said the campaigners' action was unacceptable.
Emily Highmore, a spokeswoman for E.On which owns Kingsnorth, said the campaigners' action was unacceptable.
She said: "We are trying to keep to business as usual as much as we possibly can, but the protesters are on the ship.
"What they have done in getting on to the ship was incredibly dangerous and clearly unacceptable from our point of view.
"What they have done in getting on to the ship was incredibly dangerous and clearly unacceptable from our point of view.
Greenpeace campaigner Sarah Shoraka speaking from on board the ship earlier
"We respect their right to protest but what they are doing is irresponsible and wrong, they have not got permission to be on-site."
"We respect their right to protest but what they are doing is irresponsible and wrong, they have not got permission to be on-site."
She added: "We would like them to get off the boat. They are in a secure position, but the conditions are cold. Hopefully they will decide to come down of their own accord."
Kingsnorth has been at the centre of a climate change row since E.On announced plans to build a bigger coal-fired power station to replace the existing facility.
Ms Highmore said E.ON would be keeping a watching brief on the situation and reviewing whether it could unload the coal, but ample reserves were already on-site.
Climate camp
Earlier, campaigner Sarah Shoraka, 31, who climbed the ship's foremast, said: "There are nine of us on the ship.
Nine campaigners climbed on to the coal ship using rope ladders
"We have split into three teams of three, with one team on foremast, another on the funnel and the third hanging off the side.
"We are using walkie-talkies to stay in contact with each other and have enough food and water to last several days.
"We will stay as long as we can to stop the coal being unloaded."
In the early hours, police responded to reports of Greenpeace protesters boarding and attempting to impede the berthing of a coal vessel at the power station.
Officers said protesters used ribs and entered the water to board and prevent the coal vessel from making port.
Police said the campaigners were unsuccessful in their attempts and the coal vessel docked as planned.
Kingsnorth has been at the centre of a climate change row after E.ON announced plans to build a bigger coal-fired power station to replace the existing facility.
If built it would be the first new coal-powered plant in the UK for a quarter of a century.
If built it would be the first new coal-powered plant in the UK for a quarter of a century.
An estimated 1,500 demonstrators attended a climate camp to protest against the plans last August.
An estimated 1,500 demonstrators attended a climate camp to protest against the plans last August.
