A criminal case has been registered in connection with the incident.
Out of nine persons arrested pertaining to the October 30 collapse of the century-old suspension bridge, killing 135 people, Gujarat's Morbi Court on Wednesday has sent four people to police custody and remaining five into judicial custody till November 5.
Of the four persons in police custody, two are managers of the Oreva company, which threw the bridge open for visitors after seven months of maintenance work, and the other two are fabrication work contractor's people.
Speaking on the ongoing investigation, Rahul Tripathi, SP Morbi, said, "We are questioning all the 4 accused in our custody and we are trying to establish the liability of the different kinds of lapses in the bridge renovation. We are doing a thorough investigation and if anyone's role comes forward, he or she will be booked and arrested."
He added further, "Yes, We have given a scientific report to the court but details of the same can't be shared with you at this stage as this will hamper our investigation."
The Gujarat Police has filed a First Information Report under IPC sections 304 and 308 (culpable homicide not amounting to murder) in the bridge collapse tragedy.
Earlier, the Gujarat government constituted a five-member committee to probe the bridge collapse incident.
"An FIR has been registered against the maintenance and management agencies of the bridge, under Sections 304 (culpable homicide not amounting to murder), 308 (attempt to commit culpable homicide), and 114 (abettor present when offense is committed) of the India Penal Code," said Morbi B Division Police Inspector, Prakashbhai Dekavadiya.
Briefing media persons in Morbi, Gujarat Home Minister Harsh Sanghavi said, "The toll in the Morbi hanging bridge collapse incident has gone up to 132. The Chief Minister has constituted a high power committee yesterday itself while leaving Ahmedabad. All officers, posted at different locations, were asked to report at Morbi by 2 am. The investigation is going on."
The Gujarat Home Minister further informed that a criminal case has been registered in connection with the incident.
"An investigation has begun today under the leadership of Range IGP," Mr Sanghavi said.
Everyone worked all through the night. The Navy, NDRF (National Disaster Relief Force), Air Force and Army arrived at the spot quickly. More than 200 persons have worked the entire night for search and rescue operations," MrSanghavi said.
At least 135 people, including women and children, were killed and over 100 are receiving treatment for their injuries sustained after a cable suspension bridge in Morbi town collapsed on Sunday, plunging people into the Machchhu River.
The search and rescue operation is underway in the Machchhu river.
"According to the information received from the district administration, one or two people are still missing. We are carrying out search operation along with other agencies. 5 teams of NDRF are working here," Prasanna Kumar, NDRF commandant said today.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)