Greenpeace activists sought to block a tanker on Monday from delivering Russian oil to Norway, chaining themselves to the vessel in a protest against the war in Ukraine, the advocacy group said.
The Ust Luga product tanker is currently anchored outside Exxon Mobil's (XOM.N) Slagen oil terminal some 70 km (43 miles) south of the capital Oslo, according to vessel tracker Marine Traffic.
Activists arriving in a small boat chained themselves to the tanker's anchor chain as they sought to prevent the offloading of a cargo estimated at 95,000 tonnes of oil, Greenpeace said in a statement.
The group called on the Norwegian government to ban imports of Russian fossil fuels and said Exxon Mobil's Norwegian Esso unit should cancel any contracts for such imports from Russia following the invasion of Ukraine.
According to Norway's TV2, the police detained three eco-activists for violating the 500-meter security zone around the oil terminal.