Damage to overhead lines caused rush hour rail chaos on the day the transport minister faces a grilling from MSPs over train services.

Services running between Glasgow Central and Dalmuir, Milngavie and Motherwell were cancelled shortly after 6am on Wednesday.

Network Rail stated "damage to overhead electric wires between Glasgow Central and Partick is causing disruption" which is expected to last until around 2pm.

Some services on the line have been cancelled, while shuttle or partial services have been put in place in parts of the line.

Travellers are being advised to check the latest disruption before starting their journey, while ScotRail has apologised for any disruption caused.

The travel issues arose as transport minister Humza Yousaf is due to make a statement to Holyrood on the performance of Scotland's railways and the prospect of bringing them into public ownership.

He has said he wants to work with unions and other political parties to put together a public sector bid to run the railways, which could be ready for 2020 when a clause in the contract with Abellio would allow it to be broken.

ScotRail was forced to produce a performance improvement plan in September, at the request of Transport Scotland, after punctuality and reliability fell below standard.

A train breakdown in Edinburgh last Thursday caused widespread disruption for commuters, forcing First Minister Nicola Sturgeon to apologise.

Abellio said it is working hard to improve services and argues that regardless of who runs the contract, ministers are responsible for determining fares and seat numbers, and therefore the level of overcrowding.