Police are currently dealing with an incident at Sainsbury’s in Longbridge Lane, Longbridge.
Officers were alerted at about 10am to reports that six people were suffering breathing problems.
Officers attended and the store has been evacuated and people are also being cleared from other buildings in the area.
The six patients are being treated by paramedics at the scene.
WMP have specialist officers working with colleagues across the emergency services to establish exactly what has happened.
A cordon has been put in place and police advise people to stay away from the area.
Anyone who has been in the area and is feeling unwell should seek medical advice as a precaution.