All the injured have been admitted to nearby hospitals, a disaster management cell official said.
On March 14, a footover bridge near the Times of India building at Mumbai's CSMT collapsed.
The traffic on the busy route has been affected and commuters have been advised to use alternate routes.
At least three of the dead were women, Mumbai police spokesman Manjunath Singe said. The deceased have been identified as Apoorva Prabhu (35), Ranjana Tambe (40) and Zahid Shiraj Khan (32). However, the Railway doctors and officials have been cooperating with BMC in relief and rescue operations.
The authorities began dismantling the remaining portion of the bridge late on Thursday night, PTI reported.
Without the red signal, the motorists would have passed under the ill-fated bridge near the CSMT railway station, a global heritage site, when a part of it came crashing at around 7.30 pm.
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"There is a prima facie reason to believe that the structural audit has been conducted an irresponsible and negligent manner".
The BMC has suspended two officials and ordered inquiry against two retired officials.
"As per the information received, a part of foot over bridge near CSMT station in Mumbai collapsed". Safety audits were carried out at about 445 foot overbridges, said Maharashtra Chief Minister Devendra Fadnavis after the accident on Thursday. "In spite of commissioning the report on the bridge and spending public money on it, the true condition of the bridge was not highlighted".
Rajesh Das, a labour who visited Mumbai for work said, "Along with two other friends I was going to Kolkata". "The dust and cries of the victims filled us with fear and we soon realised that a bridge has fallen". "It looked like I had near-death experience". 42 people went missing after a bridge collapse after a British-era bridge was washed away near Mahad on the Mumbai-Goa national highway on 4 August 2016.
Lawmakers and local party leaders rushed to the spot as political blame-game ensued. "In 2016, under Swachh Bharat Abhiyan, the northern end of the bridge was taken up for beautification but not repairs".