A small fire started in a light fitting leading to some smoke inside the centre, said West Midlands Fire Service.
Crews had been called to the shopping destination at around 11am today.
The centre was fully evacuated and shoppers were unable to go back inside for more than two hours.
West Midlands Fire Service tweeted to say its teams worked with Bullring management to reopen stores as soon as possible.
Incident update at Bullring, Birmingham. Incident was a small fire in a lighting unit, area has been made safe by Fire Crews working alongside bullring management team; shops will start to open back up soon. pic.twitter.com/S2E0SxDUHp— West Midlands Fire Service #ReadyWillingAble (@WestMidsFire) June 20, 2020
The Bullring said: "The safety of our customers, colleagues and retailers is our priority."
The safety of our customers, colleagues and retailers is our priority. We can confirm that the centre has been temporarily evacuated while the Fire Service investigate, and we will look to reopen as soon as possible.— Bullring & Grand Central (@Bullring) June 20, 2020
The Bullring and its sister centre, Grand Central, officially reopened on June 15 as the coronavirus lockdown was relaxed.