UPDATE: The tunnel has been reopened and all lanes are running.

The Clyde Tunnel has been partially shut on Monday morning due to an "urgent repair".

A Glasgow City Council traffic bulletin reports the A739 Clyde Tunnel Northbound has been reduced to one lane until further notice, "due to an urgent repair being required".

The timescale and nature of the repair is still unknown but further bulletins are expected to be released.

Motorists are being warned of delays.