Trains between Sheffield and Derby are delayed after a person was hit by a train at Chesterfield.
National Rail said CrossCountry, East Midlands Trains and Northern Rail services are affected by delays.
Some trains between Derby or Alfreton and Sheffield may be delayed by up to an hour or call at Chesterfield.
But some lines have now re-opened and trains are able to run through Chesterfield again after the incident at around 1pm today.
Limited road transport is continuing to supplement trains between Derby / Langley Mill and Sheffield.