At least eight drugs smugglers including five Pakistanis were killed in firing of Iranian security forces at Pak-Iran border here on Monday. The Deputy Commission (DC) Chaghi said that eight drug smugglers while trying to cross Pak-Iran border were killed in skirmish with Iranian border security forces near Tuftan. He said that five among the eight smugglers killed in clash were Pakistani national and Iranian authorities have informed Pakistan about the occurrence.