Bihar Police on Saturday arrested Ruby Rai who had topped the Class 12 examination in the Arts stream conducted by the Bihar School Examination Board after she failed a re-test, reported the Times of India. "Special Investigation Team [SIT] of Bihar police probing into the Bihar toppers scam has arrested Rubi Rai when she finally appeared for a re-test at BSEB office," a police officer told the English daily.

Rai, 17, was asked to appear for a re-examination, first on June 3 and then again on June 17. However, she did not take the test citing health reasons. Investigators will produce her in court on Sunday.

Earlier in June, the BSEB cancelled the results of Rai and another topper, Saurav Srestha, after they failed to answer questions about their subject in a video that went viral online. Both students are from VR College.

Following the controversy, the board asked all 14 toppers to appear for a re-test. The incident brought to light the possibility of mass cheating backed by a section of the education department in the state.