At least 14 people have been killed when a huge billboard collapsed on a petrol station and killed 14 people in Mumbai, India.

Police in the country's financial capital are investigating the incident and opened a criminal case against the billboard owner, media reports said.

The giant 70 by 50-meter (230 by 164-foot) hoarding in Mumbai's east collapsed Monday as fierce winds buffeted the city, accompanied by rain and dust storms.

Local authorities confirmed Tuesday that 14 people had died in the accident with 75 more injured, with rescue operations still underway.

"Medical treatment is currently being provided to 44 injured individuals, with 31 already discharged after receiving treatment," the city's municipal corporation said in a post on social media platform X.

"Unfortunately, 14 people (succumbed) to death in this mishap," it added. "Rescue operations are ongoing at the site."

Gaurav Chauhan of the National Disaster Response Force (NDRF) told Agence France-Presse (AFP) that the billboard's collapse on top of a petrol pump had complicated rescue efforts.

"We are not able to use equipment in case of fire and other hazards ... so we are using heavy cranes just to remove the debris," he said.

Media reports said Mumbai police had filed a culpable homicide case against the owner of Ego Media, the company identified as having installed the signage.

Police in the city could not be reached for comment by AFP on Tuesday morning and there was no sign that the owner had been taken into police custody.

City Councilor Rakhee Jadhav told AFP that the collapse was avoidable, blaming shoddy construction.

"This is not a disaster. If this hoarding would have been properly installed ... these casualties would have not happened," she said.

"This area is a marshland and it is also a low-lying area," she added. "The foundation of that hoarding should have gone more near the rock."

The storm that hit Mumbai on Munday uprooted trees and caused brief power outages in various neighborhoods around the city, also disrupting the city's train network.

Mumbai's international airport temporarily grounded flights with at least 15 planes diverted.

Devendra Fadnavis, the deputy chief minister of Maharashtra state, said on X that his government had ordered a "high-level inquiry" into the accident.

The state government would also make compensation payments of $6,000 (500,000 rupees) to relatives of those killed, he added.