ANCHORAGE, Alaska (AP) – The Latest on a midair collision of two sightseeing floatplanes in Alaska that killed at least four people (all times local):

7:55 a.m.

Authorities say four of the 10 people injured after two sightseeing floatplanes collided in midair near the Alaska town of Ketchikan were flown to a Seattle hospital for treatment.

Harborview Medical Center spokeswoman Susan Gregg says their injuries include “fractures to ribs, pelvis, arm and spine.”

Gregg said Tuesday morning that a 67-year-old man is in serious condition in intensive care. She says the three other patients are two women and a man in their 60s and that they are in satisfactory condition.

In Alaska, PeaceHealth Ketchikan Medical Center spokesman Marty West says the other six patients are in good or fair condition.

7 a.m.

Officials have confirmed that a Canadian is among four people who were killed in Alaska when two floatplanes carrying cruise ship passengers collided in midair.

Global Affairs Canada said in an emailed statement Tuesday that the name and hometown of the victim is not being made public for privacy reasons.

The Canadian government department expressed condolences to relatives of the victim.

A team of federal airplane accident investigators is expected to arrive in Alaska Tuesday to probe the cause of the crash.

Passengers from the cruise ship Royal Princess were on the sightseeing flights.

6 a.m.

A team of federal airplane accident investigators is expected to arrive in Alaska to investigate the cause of a midair collision between two sightseeing planes that killed at least four people.

The Coast Guard says the four died when the floatplanes carrying cruise ship tourists collided Monday near the southeast Alaska town of Ketchikan, the Coast Guard said. Coast Guard spokesman Petty Officer Jon-Paul Rios also says two others are missing.

The Washington, D.C.-based investigative team from the National Transportation Safety Board was expected to arrive in Ketchikan Tuesday afternoon.

The Federal Aviation Administration says the floatplanes collided under unknown circumstances. Floatplanes have pontoons mounted under their fuselages so they can land on water.

The passengers from the cruise ship Royal Princess were on sightseeing flights.