Nagpur: A 22-year-old man was arrested for threatening shopkeepers in the Mankapur area of Nagpur with a knife and demanding extortion money. The accused, identified as Karan alias Rohit Purushottam Nokariya, is a resident of Ingole Layout in Mankapur. The incident occurred around 8:30 PM on Tuesday, May 13, when Nokariya entered Asha Enterprises, an electronics shop near Vikas Bhavan, wielding a knife. He threatened shop owner Deepak Manmode, demanding a monthly extortion payment of ?5,000