Mysuru: Three persons, who had kidnapped a 21-year-old youth at Alanahalli and demanded Rs.50,000 for his release, have been nabbed within an hour of committing the crime on Sunday. The arrested are 29-year-old Manjunath and 25-year-old Nagaraju of Nadanahalli and 32-year-old Naveen of Subramanyeshwara Nagar in Hebbal 3rd Stage here. The three kidnappers, on Dec.1,…