Some lines are blocked at Leeds station after a train broke down east of the city.
Train operator Northern said lines were blocked and that trains running through Leeds station may be cancelled or delayed.
-> Real Junk Food Project burgled for second time in less than a week
Disruption is expected until at least 5pm.
In a tweet giving advice to customers, Northern said: "Due to a broken down train at the east of Leeds station services between York and Selby and Leeds are currently disrupted.
"There is no estimate to when normal working will resume, maintenance staff are on site."
-> The company behind HS2 is buying up homes to make way for the new lines - here is where is affected
For live information, visit Northern's stations page or tweet @northernassist.