The Long Range Reconnaissance Patrol (LRRP) (Sinhala: දිගු දුර විහිදුම් බලකාය Digu Dura Vihidum Balakaya) (Tamil:ஆழ ஊடுருவித்தாக்கும் படையணி) is a covert operation unit of the Sri Lanka Army. This unit is also known as the Deep Penetration Unit (DPU) and as the Mahasohon Brigade (Mahasohona is a demon, who made unexpected attacks at night, according to Sinhalese folklore hence literally meaning the Brigade who attacked clandestinely and unexpectedly). Colonel Raj Vijayasiri of the Special Forces is credited as the main figure who introduced the DPU concept and the Mahasohon Brigade to the Special Forces.