Mumbai:25 Jan 21 Police have made tight security arrangements at the venue of a farmers’ rally in Mumbai and protesters are not allowed to march from south Mumbai to the Raj Bhavan, a senior police official said on Monday.Thousands of farmers from across Maharashtra have come to participate in a rally at the Azad Maidan in south Mumbai on Monday against the Centre’s three new farm laws.The All India Kisan Sabha’s (AIKS) Maharashtra unit on Sunday said the protesters will later march to the Raj Bhavan and submit a memorandum to Governor B S Koshyari over their various demands