Alton Towers' newest rollercoaster, Smiler, will remain closed while the theme park's technical team investigate reports that a bolt fell from the ride.
Just under 50 people were on the ride at the time and had to be rescued.
A spokeswoman for Alton Towers said:
On Sunday 21st July, in line with our standard procedures, Alton Towers Resort closed The Smiler to investigate a small piece of debris that had allegedly fallen from the track.
At no time was any visitor at any risk, and 48 guests on the ride at the time were safely disembarked.
As the health and safety of our guests is our primary concern, the ride will remain closed whilst the resort's technical team investigate.
More top news
A second man has been charged with murder after 22-year-old Mohammed Miah was hit by a car in West Bromwich.
A family who manufactured illegal guns and bullets for criminals in the West Midlands have been jailed for a total of 47 years.
The woman who left an abusive note on an ambulance that was treating her sick neighbour has been evicted from her home.