A California man is missing in Katmai National Park after a rafting incident on Tuesday.

The National Park Service says the 72-year-old man was last seen floating down American Creek after the raft he was in flipped over. 

Three people were in the raft at the time, authorities say; the other two rafters were able to make it to shore and hike downstream to a guided camp where they used a satellite phone to report the incident. The three friends were on an unguided trip, the NPS says. 

NPS Rangers, the U.S. Coast Guard, Alaska State Troopers and individuals from the Rainbow River Lodge assisted in the search by rafting crew, helicopter and fixed-wing aircraft. 

As of Thursday, no signs of the missing man were found and the search suspended pending further evidence of the man's location. However, NPS says pilots who frequent the area have been notified and are planning to continue the search. 

NPS identified the man as John Squires, of Sacramento. Squires is said to have extensive rafting experience on Alaskan Rivers.

He was not wearing a life-jacket at the time of the incident, authorities say. 

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