CNG pumps across Mumbai and neighbouring areas witnessed long queues for the second straight day on Tuesday, as supply disruptions caused by damage to a key gas pipeline continued to hamper refuelling for vehicles.

Most CNG pumps, including those operated by Mahanagar Gas Limited (MGL), saw long queues from early morning, particularly of black-yellow taxis and autorickshaws, with several drivers reporting wait times of three to four hours, compared to the usual 15 to 30 minutes.

As per Mahanagar Gas Limited, the disruption began on Sunday after third-party damage to GAIL's main supply pipeline inside the Rashtriya Chemicals and Fertilisers (RCF) compound hit gas flow to MGL's City Gate Station at Wadala - a key entry point for the Compressed Natural Gas (CNG) supply to the city.

MGL on Monday evening said nearly 60 per cent, or 225 of the 389 CNG pumps supplying gas to the Mumbai Metropolitan Region, remained operational, and full restoration was expected by Tuesday noon.

MGL on Monday said, "Rectification work is in progress and the restoration of gas supply is expected by November 18 noon."

The Piped Natural Gas supply to households remained unaffected, it added.

On Monday also, long queues were seen at several operational pumps across Mumbai, Thane and Navi Mumbai as autorickshaws, taxis, school vehicles and app-based cabs scrambled for the limited CNG supply.

Pumps with low pressure were forced to either reduce dispensing or shut operations temporarily, petrol dealers said.

Mumbai city has around 150 CNG pumps, and many remained non-functional since Monday morning due to low gas pressure, according to the Petrol Dealers Association.