A Yemeni man stabbed three actors at a performance in the Saudi capital, police said yesterday, in the first such attack since the ultra-conservative kingdom began easing decades-old restrictions on entertainment. The knife-wielding assailant was arrested after state television footage showed him storming a musical performance in Riyadh’s King Abdullah Park by what appeared to be a foreign theatre troupe. Police said the victims were in stable condition after the attack late Monday. Police identified the assailant as a 33-year-old Yemeni expatriate but did not give details of his motive or the nationality of his victims. Prince Mohammed has introduced mixed-gender concerts, re-opened cinemas and lifted a decades-old ban on women drivers as part of a drive to modernise the Muslim kingdom in a bid to diversify its economy away from oil.