Videos on social media show plumes of smoke rising near Kerch bridge. Russia’s defence ministry said S-200 missiles had been used and shot down causing no damage.

Ukraine has not commented on the alleged attack.

There have been at least two other attacks targeting the bridge in the past few months.

The Kerch bridge was opened in 2018 and enables road and rail travel between Russia and Crimea - Ukrainian territory annexed by Russia in 2014.

It is an important resupply route for Russian forces occupying parts of southern Ukraine.

Russia’s defense ministry said that Ukraine had targeted the structure on Saturday at around 13:00 (10:00 GMT).