An early morning fire in Anchorage prompted a full response from fire fighters due to its proximity in a large apartment complex in midtown. Now, investigators will try to find out what caused it.

The blaze was reported to the Anchorage Fire Department after smoke was seen flowing out of an upstairs unit, and multiple alarms were tripped in the U-shaped complex at 5411 Mockingbird Drive.

The first call came in at 7:55 a.m. for what AFD called a "working fire" on the second floor. Between 12 or 15 units were sent initially, and another 8 AFD apparatus were dispatched as well due to the risk of the fire spreading. The entire apartment building was evacuated during the fire-fighting efforts.

"The fire was thankfully contained to just one unit, it didn't spread," said Jodie Hettrick, Fire Chief with AFD. The fire was reported as under control at 8:30 a.m.

Now, Hettrick says, a fire investigator is on the way to the scene to determine the cause and origin of the fire.