Pier 39 is closed indefinitely after a fire.

The iconic Pier 39 has closed indefinitely after a fire late Thursday.

Just before midnight, the Astoria Fire Department responded to reports of flames and smoke underneath Rogue Pier 39 Public House.

Fire crews found smoke and flames showing from the wooden pier in front of the restaurant, and were able to bring the fire under control in less than an hour.

The fire was contained to the pier, which officials say suffered significant damage.

The pier, which provides access to the restaurant, shops, cannery museum and businesses, will remain closed until a city building official can determine structural stability.

The cause of the fire is under investigation. No injuries were reported.

Floyd Holcom, the owner of Pier 39, said he is grateful the fire was contained.

“Thank you again to the Astoria and surrounding firefighters, police and all who came to protect this historic and iconic structure,” he said in a Facebook post.

Holcom told The Astorian it could have been a lot worse. He said repairs will be done as soon as possible to ensure people can return to work.

Holcom said security video was submitted to Astoria police of a smoker who he believes may have caused the fire.

Police Chief Stacy Kelly said officers found the suspect at about 5:30 a.m. Police are investigating to determine whether the man had criminal intent or was just being negligent.

Fire Chief Dan Crutchfield said the video evidence is being reviewed as part of the fire investigation.

“This certainly could have been much worse and Astoria Fire Department’s grateful for all of our partners,” he said. “We had multiple fire departments … that came out and it was a team effort.

“We got fairly early notification from a caller, which helps. It was late still — close to midnight — but if a fire like that goes unseen and has a lot of time to get a head start or if it had gotten into the building, it would have been a different scenario.”

Business owners on the pier expressed their gratitude to fire crews on Facebook following the incident.

“Send good vibes to all the shops and businesses during this scary time,” a post from Menagerie On Pier 39 said. “There is no damage to them specifically, but the pier will need to be repaired before visitors can come back.”

The owners of Arrow Tugboat & Tour Co. said they were alerted to the fire at midnight.

“Without observant neighbors and skillful firefighters, the outcome would have been far worse than a few holes in the dock,” the business said on Facebook.

“The Pier 39 dock is currently closed to all pedestrian and vehicle traffic. We will be in touch with passengers on how to access the boat for your upcoming tours.”