A non-cognisable offence has been registered against singer Adnan Sami for allegedly harassing and abusing his wife Sabah Galadari at their residence in Lokhandwala, Mumbai, police said today. "Sami's wife approached the police last night and complained that her husband had harassed and abused her. A non-cognisable offence was registered against him and she was advised to approach the court," senior police inspector Kiran Sonone said. Also, the singer has been warned not to engage in such kind of activities, he said. The offence has been registered at Oshiwara police station in suburban Andheri.