Maqshood Khan and his accomplice entered a general store in Lajipara in Kandivli (West) by rolling up its shutter in the early hours of morning.
However, three employees who were sleeping inside woke up, and while the accomplice managed to flee, they caught hold of Khan, police said.
There was a scuffle and one of the employees pulled down the shutter. Khan's neck got stuck in a gap between the shutter and the floor as he tried to crawl out, police said.
He passed out and was declared brought dead when the police took him to a hospital.
Further probe is on, he added.