Don't miss Jack Hanna talking about his close call with a bear on "The Joy Behar Show" tonight at 9 ET on HLN.
(CNN) -- Bear attacks on separate campsites in Montana left one person dead and two others injured Wednesday, according to wildlife officials.
Ron Aasheim, a spokesman for Montana Fish, Wildlife & Parks, told CNN that authorities are still trying to determine what type of bear attacked the campers at the remote Soda Butte campgrounds outside Yellowstone National Park, and whether multiple bears were involved.
No food was found in the tent where a middle-aged man was found dead, according to Aasheim, who said officials are unsure of the reason for the maulings.
Aasheim identified the injured as a man and woman. CNN affiliate KTVQ reported that the injured man was bitten on the leg and the woman suffered injuries to her arms.
Authorities told KTVQ that the incident happened between midnight and 2 a.m. Wednesday.
Wildlife officials are placing bear traps and conducting aerial surveillance, Aasheim said.
No prior incidents have been reported in the area this year, he said.
CNN's Emily Robards contributed to this report.