A grizzly bear is seen at the Saint Louis Zoo on October 24, 2017. A similar bear attacked a hiker at Glacier National Park in May. File Photo by Bill Greenblatt/UPI | License Photo

A 32-year-old hiker suffered injuries after a surprise encounter with a grizzly bear on a popular trail in Glacier National Park, marking the second grizzly attack involving a hiker in the Montana park in less than a month, according to the National Park Service.

The most recent encounter happened on May 28 on the Grinnell Glacier Trail, about 3.5 miles from the trailhead, park officials said. The hiker was crossing a snowfield when he and the bear apparently startled one another.

According to the NPS, the sound of loud rushing water in the area made it difficult for either the man or the grizzly bear to detect the other before the encounter. The bear charged and fractured the man's arm before moving away from the area.

The hiker told The San Diego Union-Tribune that he saw a grizzly cub pass him before an adult bear charged. He said he raised his arm to defend himself and was dragged roughly 20 feet by his arm during the attack.