The Rab-7 members arrested Hasan, now chairman of Dew Point School, during a raid on the school in Halishahar G Block area in the port city at around 11:00am, sources said.

Rab officials said they picked up Hasan following a complaint lodged by the woman teacher who serves in the school.

The teacher accused Hasan of making indecent proposals to her and submitted a recorded conversation in support of the allegations, they said.

There were also allegations that Hasan resorted to widespread corruption when he served as the DC of Chittagong and Rangamati, Rab sources said. He had served as the DC of Chittagong for three and a half years since 1998. Earlier, he was the DC of Rangamati.

The former DC embezzled a huge amount in government funds earmarked for compensation to the people who lost their lands during the land acquisition for the construction of Korean EPZ, sources in an intelligence agency said.

The then Anti-Corruption Bureau (ACB) also filed a case accusing him of allotting 5.5 Kathas of land for his school illegally, said a Rab officer.

Refuting all the allegations, Hasan told The Daily Star that he became a victim of conspiracy.

About the case filed by the ACB, he said the allegation was not proved.