Four more persons were held on Saturday in connection with the Buldhana rape case, where around a dozen girls were raped at an ashram school here.

A total of 15 people have been arrested so far.

The Maharashtra Government yesterday formed a Special Investigation Team (SIT) to probe the incident.

Maharashtra Chief Minister Devendra Fadnavis yesterday said the Buldhana rape incident will be probed under the supervision of a female IPS officer and assured that strict action will be taken against the accused.

The accused include president, secretary and joint secretary of the private boarding school, which is 450 kilometers from Mumbai.

Meanwhile, Nationalist Congress Party (NCP) leader Nawab Malik has demanded the ouster of Tribal Minister Vishnu Sawra and Women and Child Development Minister Pankaja Munde for alleged negligence towards tribals.

He has also demanded the resignation of Chief Minister Devendra Fadnavis for the alleged apathy towards tribals.

The issue came to light when one of the girls, who had visited her parents to celebrate Diwali, started complaining of stomach pain and on medical examination was found to be pregnant. After persistent inquiry by her parents, the girl told them about the ordeal she and some of her other friends underwent. Her parents then rushed to ex-revenue minister Eknath Khadse, who in turn asked agriculture minister Pandurang Phundkar to intervene. Phundkar visited the school — Nanabhau Kokre Ashramshala — and spoke to officials, leading to police action.