Great Western Railway and Arriva Trains Wales have suspended their service at Swansea due to a problem with line-side equipment.
No Arriva or GWR trains are able to run to or from Swansea.
Officers from South Wales Fire and Rescue say a fire at a school in Cwmbran was started deliberately.
Emergency crews were called to the blaze at St David's Juniors and Infants School on Saturday around 8pm.
Large amounts of smoke could be seen on the approach to the scene.
Firefighters managed to contain the blaze to one classroom.
Extra security has been put in place until Tuesday when the school will reopen.
Cloudy skies to start the day, and rather windy with prolonged rainfall during the morning which will be heavy at times.Read the full story ›
ITV Cymru Wales will publish the final poll of the Welsh Assembly Election 2016 campaign on Wednesday this week.Read the full story ›