The president DONALD TRUMP administration has revealed its plans to withdraw some federal security forces from Portland, Oregon, after weeks of clashes with protesters.

US Homeland Security Secretary CHAD WOLF said the pull-out was conditional on local police protecting federal buildings, the focal point of unrest.

Oregon Governor KATE BROWN said federal agents would start leaving the state's biggest city from Thursday.

Portland has been rocked by 62 consecutive days of demonstrations.

In his statement, the US homeland security secretary set no timeline for a pull-out adding that he and governor KATE had "agreed to a joint plan to end the violent activity in Portland directed at federal properties and law enforcement officers".