- "We are aware of a number of casualties," police say
- Witnesses say people emerged from the building covered in dust
- "The Curious Incident of the Dog in the Night-Time" was playing
- Ticket prices included a 1 pound "theatre restoration levy"
(CNN) -- A rescue operation was under way Thursday after part of the ceiling in the Apollo Theatre in central London collapsed during a performance, trapping people inside and causing casualties, Metropolitan Police said.
Police responded to a report of a ceiling collapse at about 8:15 p.m., the police said in a tweet, adding, "We are aware of a number of casualties but we have no further detail at this early stage."
The Press Association said witnesses saw people emerging from the building covered in dust.
The theater's website said "The Curious Incident of the Dog in the Night-Time" had been playing," which it described as "a thrilling new stage play from the National Theatre."
Ticket prices included a 1 pound "theatre restoration levy," the website said.
