Fires between Birmingham and Coventry halt trains
Rail services between Coventry and Birmingham International have been cancelled after two fires damaged signals.
London Midland said it was alerted to signal failures between Canley and Hampton in Arden at about 00:30 BST.
Engineers said they arrived to find a cable fire, while another fire was started in the Tile Hill area.
London Midland said it believed they were caused by vandalism. British Transport Police is investigating.
The train operator said the fires had caused "significant damage", with more than 20 cables affected.
Some Virgin Trains services have also been cancelled, while others face delays of about an hour.
Buses are running between Birmingham International and Coventry.
Meanwhile, CrossCountry services between Birmingham New Street and Leamington Spa are being diverted via Solihull.
Travellers in the area were already facing a number of delays and cancellations due to planned engineering works over the bank holiday weekend.
Network Rail has advised passengers to check with National Rail Enquiries before travelling.