India’s Defence Research & Development Organisation (DRDO) has recently developed a device, called the Optical Target Locater (OTL) that can identify snipers. The device can detect passive or active optical threats like telescopes, binoculars or the telescopic sight of a sniper rifle. It is a laser-based portable surveillance device which functions on the cat's eye effect and it releases a laser beam which scans a designated area and as soon as it hits any of the targets (anything optical), the location of the target is detected.