Delays of up to 40 minutes on CrossCountry between Leeds and York due to emergency services dealing with an incident at Micklefield.
There is no current estimate for when a normal service will resume.
Also affecting East Coast, First TransPennine Express and Northern Rail services.
More top news
Fans from New Zealand, Tonga, Scotland and Samoa will descend on Newcastle for matches at St James' Park
Can the Pacific Island nation defy the odds at England 2015?
MPs claim 240 people, who thought they were being kept on at a former steel works, were sent home in the middle of their shifts.