A floatplane carrying 10 people crashed Tuesday near Eastwind Lake in southwest Alaska, killing three and injuring seven. All the deceased were from outside Alaska, authorities said, according to reports.

The crash occurred near Iliamna town, 175 miles southwest of Alaska’s largest city of Anchorage, after the plane took off to a fishing spot in a river, National Transportation Safety Board (NTSB) Alaska Chief Clint Johnson said, according to the Associated Press. The aircraft, a De Havilland DHC-3 Turbine Otter on floats, reportedly ended up in the trees at the end of the lake, but the cause of the crash was not immediately clear.

The Federal Aviation Administration and the NTSB will investigate the crash.

“The investigative team is going to be looking at daylight conditions, the weather conditions, the conditions on the lake. There are a whole host of things right now,” Johnson said, according to Alaska Dispatch News. “That just happens to be one of them.”

Alaska State Troopers reportedly identified the dead as Tony W. Degroot, 80, of Hanford, California; Dr. James P. Fletcher, 70, of Clovis, California; and James Specter, 69, of Shavertown, Pennsylvania. The bodies have been sent for autopsy to the state medical examiner’s office.

Five of the seven wounded were flown to hospitals in Anchorage for treatment, Reuters reported.

Tuesday's crash marked the state's ninth plane crash this year, Federal Aviation Administration spokesman Allen Kenitzer reportedly said. Overall, 20 people have died in those crashes, he added.

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