07/31/2013 01:27 EDT | Updated 09/30/2013 05:12 EDT

Two U.S. fishermen still missing on lake in Nunavut

BAKER LAKE, Nunavut - A search for two U.S. fishermen missing on a lake in Nunavut has failed to turn up any sign of the men.

An official with the Joint Rescue Co-ordination Centre at CFB Trenton in Ontario says a C-130 Hercules airplane searched the area until Tuesday evening.

A second Hercules flew for several hours overnight.

Both have returned to their home base at CFB Winnipeg and the RCMP is continuing an investigation.

A charter aircraft was sent to pick up a man and his adult son on Monday after four days of fishing on Dubawnt Lake.

Only their boat and fishing gear were spotted — the boat had run out of gas.

The men's names and hometowns aren't available.