Israeli police have arrested 14 Greenpeace activists protesting Israel's plan to build an electricity power plant fueled by coal.

Jo Kooper, a spokeswoman for the group, said police moved in after activists on the Greenpeace flagship "Rainbow Warrior" spray-painted the slogan "Quit coal" on the side of a ship unloading coal at Ashkelon's harbor.

Police spokesman Micky Rosenfeld said they were detained upon entering a restricted area. Among the 14 arrested Monday were activists from Israel, Germany, France and Holland.

Greenpeace activists say they plan to sail to another 10 countries to protest coal-fired power plants.

Greenpeace activists lead protests against projects they feel harm the environment, including nuclear power and weapons.