Ayyub Kureshi, who allegedly threw acid on the sisters, was arrested here yesterday and the motorcycle used by him in the attack was also seized, DIG DC Mishra told reporters.
"The main accused, Ayyub Kureshi confessed his crime and accepted that he was hired for throwing acid on them by the brother-in-law of the victims. After receiving an amount of 40,000 from him, Ayyub threw acid on the four women and fled," he said.
However, another accused is still absconding, he said.
The sisters, all teachers, -- Kamerjahan (26), Ayisha (25), Isha (23) and Sanam (20) -- were attacked on April 2 when they were returning from a local college after board examination duty.
Isha, who was shifted to Sir Ganga Ram Hospital in New Delhi with a badly damaged eye, was discharged on April 12 after a successful surgery which reclaimed her vision.