ANCHORAGE — An aggressive cow moose was fatally shot last week at Denali National Park and Preserve in Alaska, prompting concerns that two calves seen in the area since then could attract bears to the park’s busy entrance, a park biologist said Monday.

A park visitor shot the moose that he said charged at his group, which included two young children. A ranger then fatally shot the wounded animal about 200 yards from the park visitor center. Someone who salvaged the moose said the animal was lactating, National Park Service officials said.

ANCHORAGE (AP) — The pilots involved in a deadly 2011 midair collision in Alaska apparently were communicating on different radio frequencies before the crash, according to a report by the National Transportation Safety Board, a finding that local aviators say underscores the danger of the mishmash of communication channels and federal guidelines in the area.

The surviving pilot Kevin Earp, of Eagle River, told investigators he did not hear the other pilot on a frequency commonly used in that area, according to an NTSB factual report released this week.

ANCHORAGE — An ongoing investigation of trafficking in the North Slope Borough has led to the seizure of multiple shipments of alcohol and illegal drugs, police said Monday.

The six separate cases are expected to be forwarded to prosecutors. Authorities said such seizures are just a small take of a problem that affects a region affected by rampant substance abuse, so it’s crucial to get the word out that law enforcement officers are watching.

“It deters the conduct,” said Brian Sullivan, an assistant district attorney based in Anchorage.

ANCHORAGE — Unseasonably warm weather in parts of Alaska has complicated training for some mushers already signed up for the Iditarod Trail Sled Dog Race.

It has also forced the cancellation of several qualifying races for future rookies of the famous 1,000-mile trek to Nome.

But there’s still plenty of snow along much of the route, Iditarod officials said Tuesday. There’s no need yet to worry about drastic changes to the race, which will start March 2 with a ceremonial run in Anchorage. The competition begins the following day in Willow, 50 miles to the north.