Two suspicious-looking devices appearing like crude bombs were found during the excavation work for a Metro line outside the Mumbai Central Station on Wednesday evening, police said.
Some workers spotted them and alerted a police constable, an official said.
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A dog squad, a unit of the Bomb Detection and Disposal Squad and a team of Nagpada police rushed to the spot, he said.
The devices, suspected to be old and unused crude bombs, had been defused and sent to the Kalina Forensic Science Laboratory for forensic testing and examination, he said.