Four people have been arrested by the Central Bureau of Investigation (CBI) in the horrific murder case of two students in Manipur in July, whose photo surfaced on social media last week. The four - two men and two women - and two minors have been flown to Guwahati in Assam. The two minors have been handed over to the child protection officer at Kamrup metro district for their welfare, protection and care, the CBI said in a statement.