Anchorage police arrested Christopher Ricker, 29, after the discovery of two bodies at the site of an apartment fire in Eagle River, they wrote in an online report late Saturday.
Police identified the victims as 68-year-old Alan Borowski and 58-year-old Linda Borowski.
Ricker is charged with two counts of murder in the first degree, two counts of murder in the second degree, arson, criminal mischief and assault.
Police officers and Anchorage firefighters were notified of a structure fire on the 16000 block of Meadow Creek Drive at 2:11 a.m. on Saturday, police wrote.
A unit inside of an apartment complex was on fire. When firefighters extinguished the fire, they found the first victim in the unit, police said. A second victim was found later as investigators searched the apartment.