A day after a foot overbridge\u00a0connected to CSMT railway station collapsed, killing six\u00a0persons and injuring 31, the Brihanmumbai Municipal\u00a0Corporation has decided to dismantle the structure.\u00a0In a meeting chaired by BMC commissioner Ajoy Mehta\u00a0Friday morning, it was also decided that the civic body's\u00a0Chief Engineer (Vigilance) would conduct an inquiry into the\u00a0causes that led to the deck of the FOB collapsing on Thursday\u00a0evening. Ward Officer Kiran Dighawkar said work on dismantling\u00a0the FOB had begun and cranes and gas-cutters had been\u00a0assembled for the work.\u00a0"We aim to open DN Road for vehicular traffic by 7pm\u00a0Friday," he said. Another official said the Chief Engineer (Vigilance)\u00a0has been asked to submit his preliminary report within 24\u00a0hours identifying staff responsible and the role of those who\u00a0carried out its structural audit. Also read|\u00a0Mumbai bridge collapse: BMC audit report had declared CST FOB \u2018fit to use\u2019 six months ago\u00a0 The scope of the probe would include the history of\u00a0the bridge, the time when the structural audit was carried\u00a0out, and whether the methodology used was appropriate and\u00a0staff deployed had adequate technical expertise, the official\u00a0informed. Earlier in the day, a BMC official had said the FOB\u00a0was was found to be structurally safe when it was audited in\u00a0August 2016, soon after a British-era bridge over Savitri\u00a0River got washed away in monsoon downpour in Mahad in Raigad\u00a0district. "During that audit, 354 bridges were checked for their\u00a0structural soundness. The FOB that collapsed on Thursday was\u00a0marked C2B. This means it needed minor repairs only. Tenders\u00a0were floated for the repair but it got held up," the official\u00a0had said Friday morning. After a visit to the site Friday morning, Chief\u00a0Minister Devendra Fadnavis had asked Mehta to fix "primary\u00a0responsibility" for Thursday's foot overbridge collapse by\u00a0evening.