BRIGHTON (WWJ/AP) – A private memorial service is planned Friday for two Michigan men who have been missing since they went to Canada for a fishing trip last month.

Seventy-year-old Earl Zellen and his 40-year-old son Matt left metro Detroit on July 21 for a one-week fishing trip in the northern Canadian wilderness, a couple of hundred miles from the Arctic Circle, according to a report by the Detroit Free Press.

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The father and son duo was reported missing on Dubawnt Lake in Nunavut after they failed to show up July 29 for a charter aircraft flight.

Searchers found the Zellens’ boat, which had run out of gas, and their fishing gear, but no sign of the men. Two Canadian Air Force C-130 Hercules helped searched the Dubawnt Lake area last month. Others searched the shore of the large remote lake, but found no trace of them.

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Police on Aug. 1 called off the search for the men, who are presumed dead. Authorities suspect the two men fell into the frigid water and died.

Earl Zellen lived in Brighton and Matt Zellen was of Bloomfield Hills. A mass is scheduled for Saturday.

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