A Belgian comedy theatre group on tour in France has caused a major security alert after practising their lines on a train journey from Paris to Troyes, reports the BBC.
The satirical play in question, Jihad, tells the story of three young people who are preparing to "go to Syria" to wage "jihad" against "unbelievers".
A worried passenger tipped off the police, unaware that the group of four were actors practising their lines.
Prior to the train's arrival on Thursday afternoon, the station in north-eastern France was evacuated.
The actors were let go after an identity check and a search of their belongings. They were carrying a fake Kalashnikov rifle - a prop.
A passenger called the police after he heard the group refer to jihad, Belgium, and bombings.
Troyes station was evacuated and cordoned off and 30 heavily-armed police in bullet-proof vests waited for the four actors to get off the train.