Gurugram, Feb. 17 -- At least 37 people, including three police personnel and two firefighters, were injured after a lubricant shop in the industrial area of Sector 24 in Faridabad caught fire that triggered a chain of explosions on Monday evening, police and administration officials said. Police said the blaze broke out around 4.20 pm at Kalka Lubricant Trading Company, a 200-square-yard shop where a large number of drums containing lubricating oil and chemicals were stored. According to officials, sheet metal cutting work on two CNC machines was also underway at the time, and the shop employed 12 workers. Officials suspect that metal fragments mixed with oil may have intensified the blaze. The shop owner sustained critical injuries and is undergoing treatment at the AIIMS-Delhi burn ward. Eyewitness Khushi Ram Rawat stated that an explosion in one of the CNC machines triggered the fire. "It was initially contained inside the shop but spread soon when explosions started taking place. At least six neighbouring shops were also gutted, including mine. My crane operator, Sumit, 21, is critically injured, and I have rushed him to AIIMS-Delhi after initial treatment in Faridabad," he said. Police reported that the exploding drums caused injuries to bystanders. Six motorcycles, two JCBs, four cars-including a Faridabad police emergency response vehicle-and a truck parked 50 to 100 metres away were charred. Faridabad civil surgeon Dr Jayant Ahuja confirmed that 12 injured were admitted to Badshah Khan civil hospital and 25 to private hospitals. "All the injured persons have sustained burn injuries caused by chemicals. Patients in the wards at the civil hospital have been shifted to make room for the burn victims," he said, adding that all doctors on leave were called back. The hospital is coordinating with Safdarjung Hospital and AIIMS-Delhi to transfer patients as needed. Among the injured first responders were sub-inspector Ravi Kumar, constable Ajnesh Kumar, special police officer Abhishek, and fire operators Bhuvi Chand and Ranvir. Faridabad police commissioner Satender Kumar Gupta explained that they were the first to arrive in a fire tender and an ERV when the initial chemical drum explosion occurred. "Afterwards, multiple explosions took place," he said. Fire safety officer Rakesh Yadav noted that 45 to 50 drums were stored inside and on the road, with 12 fire tenders deployed. A portion of the building collapsed during the blaze, which was doused after about 90 minutes. Search operations are ongoing to ensure no one is trapped. Faridabad deputy commissioner of police Ayush Sinha said eight injured were shifted to Safdarjung Hospital and AIIMS-Delhi via a green corridor. "Police will register an FIR to investigate what lapses and negligence resulted in the incident," he said. Meanwhile, police commissioner Gupta said the cause of the fire is yet to be established....