The Raj Thackeray-led Maharashtra Navnirman Sena (MNS) on Thursday approached the police and demanded that the techno music duo 999999999, also known as 9x9, must also be probed in connection with the suspected Mumbai drug overdose case that led to the death of two MBA students during a concert at NESCO earlier this month.

The party has also urged authorities not to allow the artists to leave the country until the investigation is completed.