The police have arrested the mastermind behind the deadly attack on a Rangers camp in Karachi, which resulted in three security personnel killed and four injured.The attackers were linked to an Indian proxy group, Jamaatul Ahrar (JU), and had received training in Afghanistan.Investigations revealed that the operation was meticulously planned with support from Afghan networks.Key suspects include individuals connected to JU, whose members are known for militant activities.The police emphasized that the attack highlighted the persistent threat of cross-border terrorism.Authorities have launched a comprehensive probe to trace financial and logistical links to the perpetrators.This incident underscores the challenges in combating terrorism in regions affected by regional instability.