Patna: The CBI on Sunday arrested six suspects, including the former vice-chairman of Muzaffarpur district board, Shah Alam Sabbu, in connection with the mysterious disappearance and subsequent killing of 14-year-old girl Navruna Chakravarty on September 18, 2012.

The suspects - Sabbu, Abhay Gupta (hotelier), Brajesh Singh, Vickku Shukla, Rakesh Kumar (realtors), Vinit Jaiswal (businessman) - were later produced in the special CBI court in Muzaffarpur, which remanded them to judicial custody in Khudiram Bose Central Jail for 14 days.

The six persons were summoned to the CBI office in Patna on Saturday for interrogation. The investigating agency took them into custody on Sunday after a thorough interrogation.

CBI sleuths carried out searches in the houses of the six suspects arrested earlier in the day. Their houses at Saraiyaganj, Motijheel, Chandwara and Bank Road in the district headquarters town were searched. An SP-rank officer was leading the operation, which continued till the filing of the report.

The Supreme Court is monitoring the investigation of the case. Last week, the CBI requested the apex court to extend the deadline for the arrest of the suspects in the case. "Prima facie it is evident that Navruna was killed because of a property dispute," an investigating officer told the court and produced evidence against the suspects.

Navruna, a Class VII student of Muzaffarpur-based St Xavier's School, had disappeared from her Jawaharlal Road residence on the night of September 18, 2012.

Her father Atulya Chakravarty, a former representative of a pharmaceutical company, lodged a missing case with the Muzaffarpur town police station the next day.