On the same day and in the same area, three hunters in Montana were injured in two separate grizzly bear attacks, state wildlife officials said.

Officials have not determined if the same animal was involved in both attacks this week in the Gravelly Mountains, which are southwest of Bozeman. The three hunters suffered injuries described as moderate to severe.

A grizzly charged two male hunters around 7:30 a.m. Monday before they were able to drive away the animal, Montana Fish, Wildlife & Parks said in a statement Tuesday.

Hours later, a third hunter was injured by a bear in the same general area when the animal attacked about 6:30 p.m., the department said. In that case, a second hunter was unharmed before the pair drove the bear away.

Hunters have been warned to avoid the area.

Montana Fish, Wildlife & Parks said that both men injured in the morning attack sought treatment in Ennis.

The pair then went to a sporting good store to purchase new clothes and told an employee there that the bear was about 20 feet from them and likely sleeping when they startled it, the Shedhorn Sports worker told NBC Montana.

"They said he was up and in their face, just right there on them before they even had a chance to really even grab a gun or do anything, which I think is important for people to know," the employee, Terri James, told NBC Montana.

"The bear was on top of one of the men, and the other one was able to get to his bear spray," James told the station. "And he sprayed the bear, and that's what made the bear leave."