WATCH: Virginia cops crawl through burning house to save man trapped in fire

As police officers raced up to a wooden house in the town of Culpeper, Virginia on the evening of Oct.

3, heavy smoke billowed out of the windows.

Residents who lived in separate apartments in the house stood outside, according to the Culpeper Police Department .

But one man hadn’t come out, they told police.

They worried that he might be inside.

MYSTERY STRANGER VANISHES AFTER FAMILY SAYS FRANTIC WARNING SAVED THEIR LIVES DURING DEVASTATING HOUSE FIRE Officer Ashley Sain didn’t wait.

She rushed toward the house and went in without protective gear and began checking doors, searching for anyone who might still be inside.

Moments later, Officer Neal Coffey joined her.

SHERIFF'S DEPUTY SAVES MAN FROM FIERY WRECK AFTER HIGH-SPEED CHASE ENDS IN CRASH Body-worn camera footage shows one officer running up stairs, past "No Smoking" signs with red lettering posted on the walls.

On the second floor, the duo found a door that was locked from the inside.

Smoke slipped through through cracks above and below.

MARINE VETERAN AND BOSTON FIREFIGHTER DIES AFTER RESCUE EFFORTS AT MASSIVE HOUSE BLAZE "Police department, if you’re in here!" Sain shouted over shrieking smoke alarms.

Meanwhile, Coffey quickly opened the lock with a pocket-size tool and cautiously swung open the door, calling out, "Police department!" HISTORIC NYC CHURCH ENGULFED IN 5-ALARM BLAZE; 6 FIREFIGHTERS INJURED BATTLING STUBBORN FLAMES But there was no answer.

Heavy black smoke poured from the bedroom.