The young officer, who undertook the shorter version of the half-marathon with his 12-year-old son Prakhar by his side, was lauded for his grit by cricket icon Sachin Tendulkar who flagged-off the event from the Jawahar Lal Nehru Stadium here.
"I salute your courage. You are an inspiration. We are just sports persons but you are the true achievers," Sachin told Singh as he met him on the flag off dais.
Singh has his left leg amputated and has injury to the right one after the Naxal ambush.
The officer, who has been promoted as a Deputy Commandant in CRPF after it was long overdue, has become the first blade runner hailing from security forces combating India's internal conflicts to run a marathon like sporting event.
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"I am enthused to undertake this new challenge. It's not difficult. Today I am just taking the fun run but I will train further to run seriously and as competitively as possible," Singh told PTI on the running track.
As a company commander, he led his troops in a Naxal ambush in Jharkhand's Lohardaga where he encountered blasts triggered by 192 Improvised Explosive Devices (IEDs).