There is a large emergency service presence at Ealing Broadway after an incident at a gym.
High Street closed southbound at the junction with New Broadway due to the incident.
Ealing police tweeted: “Emergency services are currently dealing with an incident outside Ealing Broadway Centre.
“Road closures are in place.
“Please allow extra time for your journey.”
Rupa Huq MP tweeted: “Suspected gas leak in Ealing Broadway, High Street aW5 cordoned off and large number of emergency response vehicles
“Shops all operating business as usual.”
Ealing Shopping Centre tweeted: “The emergency services are currently on site attending an incident in Nuffield Gym. The shopping centre remains open as normal.”