Flags were lowered to half-staff Monday on the campus of Clarkson University in Potsdam in memory of  two graduate students who were killed in a plane crash Saturday. 

They were passengers on a plane that crashed while attempting to land at Lake Placid Airport.

The Clarkson students killed in the crash were 25 year old Reed Phillips of Midland, Michigan, and 24 year old Kathleen Kafka of Rock Springs, Wyoming. 

Kafka and Phillips were both physical therapy graduate students at Clarkson.

Kafka's father was the pilot. 

He also died in the crash.

Investigators said the plane took off from Potsdam Airport

for a sightseeing tour of the Adirondacks.

See our earlier report