From BBC News: BBC News - Stage actor David Birrell injured by replica weapon
David Birrell, who was appearing in Passion at the Donmar Warehouse, suffered an eye injury after the weapon misfired during a duel scene.
Performances at the Covent Garden venue have been cancelled until Thursday and further investigations into the incident are being carried out.
Birrell, who completed his performance, is said to be in good spirits.
A Donmar spokesman said the eye injury was caused by debris from the licensed replica during Saturday's matinee show.
"In addition to investigating the matter, our priorities at this time are to David's well being and recovery," he said.