"The concerned chief engineer and the concerned executive engineer of KMDA have been placed under suspension pending completion of the probe," a statement from the state secretariat 'Nabanna' said.
It also ordered immediate inspection of the remaining portion of the flyover to ascertain its stability and safety.
It is apprehended that one cantilever pier of No 40 had shifted due to which two spans covering three piers were affected leading to the collapse, it said.
KMDA had entered into a joint venture with Hyderabad-based IVRCL for constructing the 2.2-km-long Vivekananda Road flyover in north Kolkata.
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Rail Vikas Nigam Ltd (RNVL) has been assigned the task of removing the collapsed spans on Kali Krishna Tagore Road.
The statement said 62 families in neighbouring houses have been requested to vacate their premises temporarily to enable the safe removal of the collapsed span.
So far, 24 people are confirmed to have died in the tragedy. Three of them were women.
The incident left another 67 persons injured, 16 of whom are under treatment while the rest have been discharged.