A number of ScotRail trains have been found to have a fault after high-speed services were cancelled over the weekend.
On Saturday, Hitachi 800 trains were pulled from lines as a “precautionary measure” after cracks were found in some trains.
Trains serving Edinburgh, Aberdeen, Inverness and Glasgow have been affected by the issue.
As a result, Hitachi notified ScotRail who are now inspecting their fleet of class 385 trains.
It is understood that a number of ScotRail trains have been affected by a fault, however services will not be impacted on Sunday due to rail strikes.
A ScotRail spokesman said: “Hitachi notified us of the faults with a small number of their IEP trains used by other operators. As a precaution, Hitachi is undertaking an inspection of all our class 385 trains.
“More than 60% of our class 385 trains have been checked so far, with further checks ongoing all day on Sunday.
“No 385s are scheduled to be in service on Sunday due to the RMT’s strike action. We aim to carry out inspections on all 385 trains before they re-enter service on Monday.”