The plane belonged to Horizon Air, which is owned by Alaska Airlines.
Two F-15s fighter jets pursued the plane but were not involved in the crash, local TV station KIRO7 reported.
Pierce County Sheriff's spokesman Ed Troyer told the Bellingham Herald that information was preliminary regarding the developing incident. "Our hearts are with the family of the individual" who flew the plane, she said.
A video uploaded to social media showed an aircraft matching a Q400's profile flying above a rural area, followed by a fighter jet.
Audio has been released from the Horizon Air worker who took off from Sea-Tac Airport and crashed on Ketron Island in south Puget Sound.
Officials said the plane later crashed into the sea.
The man later said that he was sorry. The aircraft then crashed into Ketron Island, 40 km to the southwest of the Seattle/Tacoma Airport. "We're just trying to find a place for you to land safely".
Baker Mayfield shines during his Browns debut
The second of those scampers - a 5-yard, red-zone dash on fourth-and-2 - set up Mayfield's 10-yard touchdown toss to David Njoku . In three years at Penn State, Saquon Barkley racked up 1,195 rushing yards and eight touchdowns on 5.7 yards per carry.
He also said he didn't want to land at a nearby military base, telling ground crews 'those guys will rough me up if I try and land there'.
Morgan Chesky, a reporter for KOMO News, wrote on Twitter, "Per JBLM source: After being contacted by F-15's, stolen plane began to nose dive, crashing in north Pierce County".
Royal King told The Seattle Times he was photographing a wedding when he saw the low-flying turboprop being chased by to F-15s.
Flights were grounded with some passengers tweeting that their plane stopped abruptly on the runway.
"I got a lot of people that care about me and it's going to disappoint them to hear about this", says the pilot, who ground control addresses as Rich."I would like to apologize to each and everyone of them".
Black smoke was spotted pouring from the crash site. It reported that the plane was stolen by a mechanic.
The sheriff's office said that "this is not a terrorist incident" and that the pilot was a mechanic from an unknown airline.
The Coast Guard confirms that the plane crashed on Ketron Island, just off the shores of Steilacoom.
The team announced the prognosis Friday following an MRI, saying Guice should make a full recovery and be ready to play in 2019. Previous year at LSU, Guice was hampered by a hyperextended knee, limiting his snaps and forcing him to miss a game.
At least three Palestinians died in Gaza , according to the Palestinian Ministry of Health in a CNN report . A Palestinian rocket struck the southern city of Beersheba late in the afternoon, landing in an open area.
Using the N-word wasn't just the way he talks but, more disturbing, it was how he thought of me and African-Americans as a whole'. Sanders also says, "It's sad that a disgruntled former White House employee is trying to profit off these false attacks".
The Perseid Meteor Shower makes its annual display from July 17th - 24th; however, the shower's peak falls on August 12 - 13th. This year's show is predicted to be an "average" show by Perseid standards, with as many as 50-60 meteors per hour at peak.
Mr Erdogan has been putting pressure on the central bank to not raise interest rates in order to keep fuelling economic growth. President Trump and Turkish President Recep Tayyip Erdogan appear in the Roosevelt Room of the White House on May 16, 2017.
Catholic and evangelical groups protested abortion with the slogan, " Argentina , filicide (child murder) will be your ruin". Meanwhile, at the city's Metropolitan Cathedral, a "mass for life" was held in support of keeping laws unchanged.
The meeting comes after Benjamin made comments criticizing his former team, Carolina, and quarterback, Newton. It's not clear what they said to each other, but the interaction did not end in the friendliest of ways.
Schuette, Whitmer win primaries in gubernatorial races
Just over 28 percent of the voting-age population cast ballots, an upturn over the previous high of 24 percent from 1982. John James and Sandy Pensler squared off in a GOP primary for the chance to face Democratic Sen.
U.S. issues warning to citizens after Kerala floods
Rino of Manaykkaparambil house, Panickankudy was killed in a landslip which occurred near the premises of his house on Friday. Amid rains continuing to lash the state, educational institutions across Kerala have declared a holiday today.
Shearer: Don't write off Manchester United
With so much business being done since the end of last season, it has been tough to keep track of who has gone where. The Reds will start the new Premier League campaign with a clash against West Ham United at Anfield on Sunday.
Jurgen Klopp under pressure after summer spending spree
However, Liverpool will definitely be without Dejan Lovren and Ragnar Klavan for Sunday's Premier League opener at Anfield . Rangers have to look up and think about closing the gap, and then see what happens the following year.
College coach arrested in punching death in Queens
Szabo lost consciousness when his head hit the pavement, and he was brought to an area hospital in critical condition. He was arraigned today on a misdemeanor assault charge and released on his own recognizance after entering his plea.