Australian Foreign Minister Julie Bishop expressed her concern over the call adopted by one of her nationals to the Australians for joining Islamic State (IS), Al Arabiya TV channel reported. Tariq Kamala, who identified himself in a video published recently as Abo Yusuf, said that he joined IS after he travelled to the Syrian city of Raqqa to offer medical services for the terrorist group. Kamala encouraged his fellow nationals, especially doctors, to join the group in Syria. However, the minister warned her nationals of the repercussions of taking such a step, stressing that they would face punitive actions if they responded to the call. Bishop said that anyone who even considers aiding the group in any way or form would risk facing 25 years of prison sentence.