Arif Majeed, 23, from Kalyan, near Mumbai, who until now was believed to have been killed while fighting for militant group ISIS in Syria, has been arrested, hours after he landed in Mumbai. He was grilled by central security agencies and the NIA. A case has been filed against ISIS and its operatives under the IPC section that deals with waging war against any Asia country that has friendly ties with India, entailing maximum punishment of life imprisonment. Reports say in May four youths from Kalyan including Arif left India to visit holy places, but they disappeared and since then were suspected to have joined the Sunni extremist group. Police say the four engineering students flew to Baghdad as part of a group of 22 pilgrims, to visit religious shrines in Iraq. The next day Arif called his family and apologised for having left without informing them. Upon returning to India, other pilgrims told police that Arif and the other three went to Fallujah. In August one of the men called Arif's family and told them their son had become a martyr, and died fighting for ISIS in Syria. Recently Arif's father met the NIA and told them his son had fled from the IS-controlled areas to Turkey and wanted to return to India.