A four-year-old Bulgarian boy has sustained severe injuries after falling ten meters down from a shopping mall escalator.

The incident happened Tuesday evening at Grand Mall Varna, the police in the Black Sea city informs.

The child was at the mall's daycare, but has managed to leave unnoticed. He leaned on the escalator's moving railing and was dragged before falling 10 meters down.

The emergency ambulance took him to the local St Anna hospital where he underwent surgery. The boy has suffered numerous fractures and is still in critical condition.

There were three staff and the receptionist inside the daycare at the time. They have all been interrogated by the prosecutor's office in Varna, along with one manager of the company owner of the daycare.

The authorities are probing the case – they are interrogating witnesses and have seized tapes from the security cameras.

Employees of the mall say they are ready to donate blood if necessary.

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