Sheezan Mohammed Khan, co-star of actor Tunisha Sharma -- a television actor who on Saturday allegedly died by suicide on the set of a TV show in Vasai in Maharashtra's Palghar district -- was arrested after a case of abetment to suicide was registered against him, police said today. He was this afternoon sent to four-day police custody by Vasai court in Mumbai. Parth Zutshi, another co-actor, was called by the police on Sunday for questioning on the incident.