OSLO (Reuters) - Some 300 U.S. Marines landed in Norway on Monday for a six-month deployment, the first time since World War Two that foreign troops have been allowed to be stationed there, in a deployment which has irked Norway's Arctic neighbor Russia.

Officials played down any link between the operation and NATO concerns over Russia, but the deployment coincides with the U.S. sending several thousand troops to Poland to beef up its Eastern European allies worried about Moscow's assertiveness.

Marines from Camp Lejeune in North Carolina landed a little after 10 am