Police on both sides of the Yukon-Alaska border are waiting for autopsy results on a body pulled from the Yukon River.

A paddler on the Yukon River spotted the body floating in the water near Eagle, Alaska, last Tuesday but  wasn't able to contact police until Sunday. 

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Michael Ludwig, 65, was last seen on June 10 at Britannia/Canadian Creek along the Yukon River. (RCMP)

Alaska State Trooper spokesperson Megan Peters said it's not known yet if the body is that of missing Yukon canoeist Michael Ludwig.

"A village public safety officer and also park officials responded on the 30th and they were able to locate the remains and recover them," she said.

"At this point in time they have been sent to Anchorage where the state medical examiner will attempt to do a positive identification."

Ludwig was last seen three weeks ago paddling a red canoe near Britannia Creek on the Yukon River on his way to Dawson City.