Arrangements for hanging the four men convicted in the gang-rape, torture and killing of a young medical student in Delhi in 2012 began last month, as the city's Tihar jail prepared for the execution ordered by a court today for January 22 at 7 am. "We will seek service of a hangman from Meerut. We have proper arrangements at the jail to execute all the four convicts together," a prison official said, requesting not to be named.