Police in Anchorage, Alaska, confirm that James Dale Ritchie, killed by an Anchorage police officer whom Ritchie had tried to kill in the fall of 2016, was a serial killer who had used the same gun to kill 5 people, apparently at random. Two of the murders were double homicides, with some of the deaths occurring along Anchorage's expansive Tony Knowles Coastal Trail.
A damaged natural gas pipeline operating under Cook Inlet offshore of Nikiski (near Anchorage, Alaska) continues releasing between 6,000–8,800 cubic meters (210,000–310,000 cubic feet) of gas per day. Pipeline operator Hilcorp Energy states that due to sea ice conditions, repairs will not be possible for weeks.
The United States cancels two potential Arctic lease sales off Alaska's northern coast, and announces Shell and Statoil current leases will not be extended because of "current market conditions and low industry interest."