The Nagpada police have arrested a 25-year-old man for allegedly stalking his former girlfriend and blackmailing her, threatening that he would throw acid on the 21-year-old if she did not have a physical relationship with him.

The accused has been identified as Javed Sayyed, originally from Delhi; he has been working in a private firm for a while now in Mumbai. The girl became friends with Sayyed through a social networking site four years back when she was in Std XI.