Ullal: Ullal police have registered a case against four persons following a complaint that seven students of a private pre-university (PU) college in Derlakatte were allegedly subjected to ragging... Two seniors, identified as Ashab and Ashfaq, allegedly threatened them.On October 15, the complainant and six other students went to a hotel outside the college campus for lunch. Ashab allegedly took them to a private hotel room and confined them there.