There is major disruption to railway services between Dundee and Glasgow following a fire on the line overnight.
Fire crews were called after a blaze broke out at the Longforgan signal box at about 1.30am on Thursday morning.
The incident caused damage to the surrounding signalling cables.
All trains between Glasgow and Dundee are terminating at Perth.
ScotRail says there will be disruption “until the end of the day”.
Engineers have been on site all morning and are working on repairs.
Commuters are being told they can travel to Glasgow from Aberdeen and Dundee via Edinburgh.
https://twitter.com/ScotRail/status/1060480644181118976
A Network Rail spokesman said: “Services have been disrupted by significant damage to signalling cables following an overnight line-side fire near Longforgan.
“Our engineers have been on site throughout the incident assisting the fire service and now working to repair the damaged equipment.
“We will restore normal services as quickly as possible for customers.”
A ScotRail statement reads: “Due to a fire next to the track between Perth and Dundee the line is closed. Disruption is expected until the end of the day.
“Train services between Glasgow Queen Street and Aberdeen will be suspended between Perth and Dundee.
UPDATE: Staff are on site and performing their investigation, after this an estimate will be given for repairs to be completed.
— ScotRail (@ScotRail) November 8, 2018
“There has been a fire near the railway overnight which has caused damage to the signalling system.
“Staff are on site and performing investigations after which we’ll be able to provide a robust estimate for repairs to be completed.
“At present, we’re making provisions for buses to replace trains between Perth and Dundee for the remainder of the day.
“Passengers can travel between Glasgow and Dundee/Aberdeen via Edinburgh.
“Passengers with valid tickets may also travel on Cross Country and LNER services between Edinburgh and Aberdeen.
“We’ll be operating a bus shuttle service between Perth and Dundee.”
A fire and rescue spokesman said: “We got the call at 1.34am and mobilised one appliance from Macalpine Road.
“It was a small electrical fire at the side of the railway line. Power was isolated and CO2 extinguishers in use. We left at 3am.”
More information can be found here.