Officials have shut down the ride while Port Townsend police investigate the incident.
The victims fell onto the metal base at the bottom of the ride, according to East Jefferson Fire Department spokesman Bill Beezley.
A 59-year-old woman, a woman in her 40s and her 7-year-old child were airlifted to Harborview Medical Center. Officials say a 59-year-old woman was in critical condition, but is expected to recover.
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When the three fell, "one of them lightly clipped a 30-year-old man on the way down", Beezley said, but the man declined medical attention.
Janke-Call said she and her boyfriend heard a grinding noise right before the bucket tipped over.
She estimated that about 15 people were riding the Ferris wheel at the time and described it as a "violent accident".
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In the Bronx, neighbourhood acquaintances said Rojas was a friendly man who had been having problems. Witnesses said the motorist had driven against traffic and onto the sidewalk, striking pedestrians.
'According to an eyewitness, one of the Ferris wheel carts flopped upside down, ejecting three occupants, ' Mr Beezley said, as reported in Komo News.
Those responding to the scene were told that the cart was faulty. Electrical inspections are also required each time a ride is set up.
Brandi Hamon and Debbie LaFollette, the vice president and president, respectively, of the Rhododendron Festival, said in a joint statement, "First and foremost the Rhododendron Festival would like to ask for everyone to please pray for all the victims in today's carnival accident".
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Ajinkya Rahane and captain Steve Smith mopped up the remaining runs to lead their side to victory with eight overs to spare. Both Manoj Tiwary and Dhoni were struggling with the wicket holding up and the Mumbai bowlers bowling a disciplined line.
'This was a tragic event and our thoughts and prayers are with all involved. Both the 47-year-old woman and the boy were taken to Jefferson Healthcare in Port Townsend, Beezley said.