VISITORS have been evacuated from Hamerton Zoo as police and air ambulance were spotted outside the attraction.

People took to social media to tweet about the closure in Huntingdon, Cambridgeshire.

Chris Hubbard posted: "Police and air ambulance called to @HamertonZoo and guests are being cleared out. Hope everyone's okay."

He also tweeted a picture of the scene which appeared to show an air ambulance and emergency services on the scene.

<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">We attended an incident at Hamerton Zoo Park today. We are unable further info at this time but we can confirm that no animals have escaped.</p>— Cambs police (@CambsCops) <a href="https://twitter.com/CambsCops/status/869194812083384321">May 29, 2017</a></blockquote> <script async src="//platform.twitter.com/widgets.js" charset="utf-8"></script>

Jessica Russell said on the site: "I shouldn't leave the house... Try to go to @HamertonZoo and all hell breaks loose. Evacuated and air ambulance/police/ambulances."