Northern has warned that rail disruption is likely to continue until the end of the day while damaged wires are repaired at Kearsley, between Bolton and Manchester.
It is affecting journeys between Manchester Airport, Manchester Oxford Road and Manchester Piccadilly to Preston, and no trains have been running through Bolton this morning.
Northern Trains tweeted: “Due to damage to the overhead electric wires between Preston and Salford Crescent the line is blocked. Services through Buckshaw Parkway, Chorley, Adlington, Blackrod, Horwich Parkway, Lostock, Bolton, Moses Gate, Farnworth, Kearsley and Clifton will be cancelled or revised.”
Some rail replacement transport will be provided, but Northern says journey times by road will be extended by an hour and has advised people to check their journeys online before setting off here.
A National Rail spokesman said: “Damage to the overhead wires at Kearsley means all lines are blocked. As a result, Northern services between Manchester Victoria / Manchester Oxford Road and Bolton are subject to severe disruption.
"Services may be cancelled, delayed by up to 90 minutes or revised. Major disruption is expected until the end of the day.”