A man clinging to a log just above Niagara Falls was rescued Thursday.

A visitor from Pennsylvania and a tour guide said they first spotted the man in the upper Niagara River.

They called New York State Parks Police for help who was able to reach the man and bring him to shore.

The incident happened near Goat Island just above the Falls.

It is unknown why the man was in the river, but he was semi-conscious when he was rescued and was taken to the hospital.

Authorities said the rescue took about two hours and do not know how long the man was in the water before the rescue.

Authorities said the temperature of water was 51 degrees.