To prevent separatist called protests against civilian killings security was heightened in some parts of Srinagar city on Friday.The Joint Resistance Leadership (JRL), a separatist conglomerate headed by Syed Ali Geelani, Mirwaiz Umer Farooq and Muhammad Yasin Malik, has called for peaceful protests after the congregational Friday prayers against killing of four civilians in Kulgam district on Wednesday.While Geelani and Mirwaiz have been placed under house arrest, Malik has been lodged in the Srinagar Central Jail. Government on Friday disallowed Friday prayers at historic Jamia Masjid. In the areas of downtown heavy deployment of police and paramilitary forces was made to patrol the streets and restrict people’s movement.Mobile Internet services continue to remain suspended in south Kashmir areas since Thursday while the speed of mobile Internet has been slashed in Srinagar.Train services between Baramulla and Bannihal towns have been suspended. (PTK)