“Avoid the area if possible.”
There have been no reports or injuries following the explosion.
The explosion is believed to have taken place at 6.30am while the road is expected to be closed for the rest of the morning.
One person told Birmingham Live: “There was a massive explosion this morning. I assumed it could have been to do with a massive fire from fly-tipping.
“There was a load of rubbish by the bridge.
“I have been evacuated. They moved us all out and turned the gas off.
“It’s been handled pretty well. It happened about half 6 when it when boom.
“It was really loud. I thought someone had hit a car.”
This is a breaking news story, more to follow…