A pilot who died in the fatal collision of two sightseeing sea planes in Alaska has been identified.
10 others were taken to hospital after two float planes collided mid-air, crashing into the water in Ketchickan.
The U.S. Coast Guard said in a statement late Monday that four people have been confirmed dead, and two remain unaccounted for.
Princess Cruises is owned by Miami-based Carnival Corp.
In a statement to CNBC, Taquan Air, the company which operated the De Havilland Otter plane, said it has suspended all flights.
Investigators will want to talk with surviving passengers, the pilot of the Taquan airplane, other employees of the air operators as well as other pilots and witnesses that were in the area at the time, Homendy said.More news: Dauntless monster hunting Xbox One X gameplay video
"The Misty Fjords National Monument is home to some of the most dramatic scenery in Alaska, and only by air will you be able to fully appreciate the dramatic beauty of land, slowly crafted by the hands of nature over tens of thousands of years", says the cruise line in promoting the tour.
It was carrying 10 guests from the Royal Princess and a pilot, who were all Americans, the statement said. The Coast Guard recovered the bodies of two guests and the pilot. The search for the two missing people, an Australian and a Canadian, continued as federal investigators began probing the cause of Monday's deadly crash.
All patients were in fair or good condition, according to Marty West, a spokeswoman for PeaceHealth Ketchikan Medical Center.
The Royal Princess cruise ship left Vancouver for Anchorage on Saturday and is scheduled to return on May 25.
Cruise Critic user nick659 posted on the public forum early Wednesday this letter he said he received from Princess Cruises as a passenger on the Royal Princess ship.
The two sightseeing planes collided Monday afternoon off the coast of Alaska, leaving at least four people dead, the Coast Guard said.More news: Two coffees a day could help you live longer, research suggests
"We immediately ... sent additional team members to Ketchikan overnight to assist the families impacted".
Weather in the area where the crash happened Monday included high overcast skies with southeast winds gusting at 14 kilometres per hour.
It is not the first time a major plane crash has occurred near Ketchikan, a popular tourist destination.
Three people who died were among the five on board the second plane, a single-engine de Havilland DHC-2 Beaver, according to the United States coastguard.
The NTSB later determined that pilot error and lack of a formal safety programme were behind the crash. Previously, she worked at Vice News in Brooklyn, NY, where she won a Front Page Award from the Newswomen's Club of NY for a national investigation of police shootings.
This report was supplemented with material from The Assocaited Press.More news: Black Mirror Season 5 Trailer Reveals Anthony Mackie And Andrew Scott Episodes