A Kansas University graduate and his wife were killed in a rare attack by a grizzly bear.

Richard Huffman, 61, a native of Belleville, and his wife, Katherine, were killed in their tent at a campsite along the Hulahula River in the Arctic National Wildlife Refuge.

Officials are not sure when the couple was killed.

Officials also said their campsite was clean, with food stored in bear-proof containers. Tim DeSpain, spokesman for Alaska State Troopers, said the scene indicated the incident was a “predatory act by the bear.”

A rafter had seen the animal at the site and notified authorities.

The couple’s injuries were consistent with a bear attack and there were no signs of foul play, said Kelly Alzaharna, a lieutenant with the North Slope Borough Police Department.

There were no other people at the campsite, which was about 12 miles upriver from Kaktovik, a community of about 300 on Barter Island and the only village in the refuge.

KU records show Richard Huffman graduated in 1965 with a bachelor’s degree in political science. He graduated from the KU School of Law in 1968.

According to the Anchorage Daily News, Richard Huffman was a partner in the Kemppel, Huffman and Ellis law firm in Anchorage. Katherine Huffman was a teacher in the Anchorage school district.