The museum was busier than usual today due to children and parents being off for half term. The museum has since said it is back open, but has not said why people were told to leave at 3pm. A spokesman told Express.co.uk: “Shortly after 3pm o’clock today, the Science Museum was evacuated due to a small incident.
“This was investigated by the emergency services who were able to resolve the situation quickly.
“The museum reopened to visitors shortly afterwards.
“We are sorry for the inconvenience caused to our visitors, whose health and safety is paramount.
“All ticket holders for specific offers can re-book or request a refund for their tickets by contacting the museum on 020 7942 4000 or via any ticket desk in the museum.”
“I can’t provide any further details at this stage, but will provide an update as soon as I can.”
One visitor to the tourist attraction wrote on social media said: “Wow that was scary.
“Just got evacuated from the Science Museum. “
An alarm sounded telling everyone to find the nearest exit due to an incident.