According to eyewitnesses, the crowd had gathered on the bridge to watch fire and emergency services personnel rescuing a youth who had jumped into the river in a suicide bid. Officials said navy divers with Geminis boats were carrying out searches.
One dead body was recovered and around 10 people were taken to the hospial after rescue, while the search for the rest is on.
As per reports when the bridge collapsed there were more than 50 people on the bridge and over 30 people are still missing.
The rescue operation is now underway.
PWD minister Sudin Dhavalikar, who immediately rushed to the place and said "the bridge was closed for use for the last four years". The exact number of persons missing was still not known five hours after the accident, even as one body has been fished out of the river.
The bridge across Sanvordem river, a tributary of the Zuari in South Goa, had caved in under the weight of scores of onlookers watching the rescue operation of the man, who committed suicide. Around 20 managed to swim to safety and several others were rescued and taken to hospital, police sources said.
Chief Minister Manohar Parrikar on Thursday told reporters that all concerned agencies have been pressed into action.
"The distance between me and the portion of the bridge which collapsed was hardly two to three metres". At least fourteen people were rescued from drowning and the rescue operation at site has been stopped.
Rescue operations by the Navy and the Coast Guard were under way until last reports came in.
"Chetak helicopters in search and rescue role ... to search downstream".