Story highlights Officer Luis Lopez spotted a raging house fire in April

Despite a lack of training, he rushed in and got three people out of the house

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(CNN) Boston Police officer Luis Lopez has not received any fire training in his 20 years with the department. But when he saw a raging house fire just blocks from his precinct on April 30, his instincts took over, and he rushed into the three-story home to get people out.

"As I pulled into the police station, I could see heavy black smoke," Lopez recounted. "I get on the radio and asked the police dispatcher if there was a fire nearby. The dispatcher replied that there wasn't. No one had called it in."

But Lopez could clearly see there was danger just blocks away, and he was determined to find it. He drove his police car toward the thick black smoke and ended up on Montello Street, where he saw a group of people gathered in front of No. 8. Lopez was the only official on scene; the fire department hadn't arrived yet, and his fellow police officers were still on their way, so Lopez took charge.

"As I'm yelling at people to get back, now people are yelling back at me that there are people inside the house," Lopez recalled.

Rear of the buildibg pic.twitter.com/M2HZf2E5nI — Boston Fire Dept. (@BostonFire) May 1, 2016

He didn't know how many people were inside or what the conditions would be, but Lopez ran along the side of the home and burst through the side door. "When I end up in the kitchen, and I start looking around, and I go, 'Hello?! Boston Police! Anyone in here?' " No one answered. But when Lopez saw a locked door off the kitchen, he decided he needed to force his way through it to make sure no one was inside.

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