Police in Maryland are hunting for a 'heartless' thief who stole a four-year-old boy's wheelchair in the middle of the night.

The youngster's mother left the buggy in the lobby of their building on Merrimac Drive, Langley Park, as usual on Sunday evening since it's easier to carry her son to their second floor apartment.

But when she went to retrieve the stroller the following morning, it had reportedly disappeared.

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Caught on camera: Police in Maryland are hunting for a 'heartless' thief (seen above on CCTV footage) who stole a four-year-old boy's wheelchair in the middle of the night.

Distraught: The youngster's mother left the wheelchair in the lobby of their building on Merrimac Drive, Langley Park, as usual on Sunday evening since it's easier to carry her son to their second floor apartment

Prince George's County Police have released a piece of surveillance footage which shows a person pushing the empty chair in a parking lot.

They're asking anyone with information about the case to contact investigators.

The film appears to show a dark-haired white male dressed in a jacket and pants.

A cash reward is being offered.

Commenting on the incident, Capt. Ken Humbel said: 'This family already faces challenges and shouldn't be burdened with the emotional and financial stress of the theft of this wheelchair.

Flashback: The boy's mother has shared a video of her son using his chair in a bid to trigger tip offs

'The suspect we’re looking for has no heart.'

Anyone with information about the theft is being urged to call police at 301-699-2601 or Crime Solvers at 866-411-TIPS.

The boy's mother has also shared a video of her son using his chair with the community in a bid to trigger tip offs.

While officers search for the suspect, they're in talks with a foundation that may help find a replacement chair in the meantime.