The reported loss of a further bolt from Alton Tower’s Smiler rollercoaster closed the ride for part of Sunday.
Workers using a mobile elevated work platform were seen fitting and torquing a replacement bolt to the ride’s first drop.
It re-opened after 3pm on Sunday, with no comment regarding the issue made from the park.
In July this year, a gap appeared in the track when a bolt sheared and fell to the ground, forcing the closure of the ride for several days.
It is not clear precisely how the latest bolt loss occurred, but the section of track affected is above the toilet block at the entrance to the X Sector area of the theme park.
Photographers from the TowersStreet website have posted an image of damage to roof tiles, directly beneath the affected section of track.
The Gerstlauer-manufactured ride has been dogged by engineering problems since the construction phase, with the ride opening over two months late and facing a series of closures throughout this season.