Bhopal, May 7 -- Six men were arrested and a boy was detained for allegedly raping and blackmailing four girls in Ujjain district of Madhya Pradesh on Tuesday after an obscene video of a minor surfaced on social media leading to communal tension in the area, police said. Security was heightened in the village where the incidents took place after some Hindu organisations staged a protest and tried to torch the house of the main accused, identified as Farman Khan, in the afternoon. "After the video went viral, we arrested Farman Khan and his friends who befriended minor girls of the village and shot obscene video after rape. The accused also recorded video calls with the girls," Ujjain superintendent of police (SP) Pradeep Sharma said. The f...