Prayagraj/IBNS: A 50-year-old Geography professor has been arrested by the police in Prayagraj for sexually abusing his students.

According to reports, he allegedly filmed these acts and used these 59 videos to blackmail them into keeping mum, as well as force them to perform further sexual favours.

Rajnish Kumar, who is the Chief Proctor of the Seth Phool Chand Bagla PG College in Hathras, has been on the run since the allegations broke earlier this week.

He was arrested after being on the run for 72 hours.

He said he only began recording his attacks a few years ago - after a web camera inadvertently recorded a student being molested - indicating many more women may have been raped, NDTV reported.

As per reports, he had also accepted bribes from students and their parents to give them higher marks on tests and find them jobs, which he also used to force sexual favours.

Kumar reportedly told the cops that in 2009 he was in a sexual relationship (reportedly consensual) with a student. Once during their sex, the webcam on a computer recorded them.

That, he claimed, gave him the 'idea' - to record women being raped and blackmail them.

According to Chiranjeev Nath Sinha, the Superintendent of Police in Hathras, Kumar then installed special software on his computer to record his rapes.

Kumar was previously married - in 1996. However, the status of that marriage is unclear. The couple did not have children.

In 2001, he was appointed as a teacher at the Bagla College. Last year he was promoted to Chief Proctor.