Busted!

A burglar was caught in the act inside a Bronx building — and from the look on his face, he knew the moment he was caught on camera, footage released by cops on Thursday shows.

The crook burgled three offices inside 880 River Ave. in West Concourse on separate occasions between July 3 and July 5.

He was captured on surveillance footage inside Diamond Reporting and Legal Video, where he’s seen wandering around the kitchen and browsing through the fridge. While there, he snatched a laptop worth $500.

The thief broke into Highbridge Head Start, where he stole $1,700 worth of property, including a television, a digital camera, three laptops and jewelry, cops said.

He also took a $1,300 MacBook Pro from Eye Care & Surgery.

Cops described the wanted man as approximately 30 years old with black hair and brown eyes.