Live updates as M4 closed due to 'police incident' with air ambulance at scene

The M4 has been closed in both directions due to a "police incident". The motorway is closed at Junction 44 for Lon Las, with long delays building.

Witnesses have said the air ambulance landed on the carriageway as a result of the incident. It has since left the scene. Traffic Wales said the motorway was "temporarily closed" and said further updates would follow.

This is a breaking news incident and we will bring you all the latest as we get it via the live blog below. Join our WhatsApp news community here for the latest breaking news.