A ransomware attack on a technology service provider has forced payment systems across nearly 300 small local banks in India to shut down temporarily, two sources directly aware of the matter told Reuters.

The attack affected C-Edge Technologies, a provider of banking technology systems to small banks across the country, they said.

C-Edge Technologies did not respond to an email seeking comment. The Reserve Bank of India did not respond to Reuters’ request for comment.

The National Payment Corporation of India (NPCI), an authority that oversees payment systems, in a public advisory issued late on Wednesday, said that it had “temporarily isolated C-Edge Technologies from accessing the retail payments system operated by NPCI.”

“Customers of banks serviced by C-Edge will not be able to access payment systems during the period of isolation,” the NPCI said.

Nearly 300 small banks have been isolated from the country’s broader payment network to prevent any wider impact, the sources, who are officials at a regulatory authority, said.

“Most of these are small banks and only about 0.5% of the country’s payment system volumes would be impacted,” said one of the sources.

India has nearly 1,500 cooperative and regional banks which mostly have operations outside big cities. It is some of these banks that have been affected, the sources told Reuters.

NPCI is conducting an audit to ensure that the attack does not spread, the second source said.

The RBI and the Indian cyber authorities have warned Indian banks about possible cyber attacks in the past few weeks, banking industry sources and the first source said.

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Severe waterlogging and heavy traffic jam was reported in Delhi today after persistent rainfall. A ‘red’ warning was issued by the India Meteorological Department (IMD) after the national capital recorded over 100 millimeters of rainfall within an hour.

Though no official statement has been made by the weather office, according to IMD, 100 millimeters of rainfall within an hour is defined as a “cloud burst.”

The Pragati Maidan area recorded 112.5 mm of rain within an hour, causing widespread waterlogging in low-lying areas.

Heavy traffic has been reported across the national capital with some areas reporting severe congestion. Major disruptions have been reported from Kashmere Gate, Rajinder Nagar and the Qutub Minar area.

Due to water logging near the Qutub Minar metro station area, traffic has been majorly affected in both carriageways of Anuvrat Marg.

Major traffic jams have also been reported from Guru Ravi Das Marg on both carriageways due to the falling of a tree near Tank Road Chowk.

The Outer Ring Road, especially the stretch from Chirag Delhi to Nehru Place, has seen major traffic congestions due to waterlogging under the Savitri flyover, according to reports.

Mahatma Gandhi Marg has also been majorly impacted due to the waterlogging at Nigam Bodh Ghat, leading to traffic being rerouted from Chandgi Ram Akhara.

Near Delhi University’s North Campus area, visuals from Kamla Nagar show waterlogged streets and vehicles partially submerged in water. Streets near Connaught Place are also suffering from severe waterlogging.

Delhi’s Lieutenant Governor has “cautioned all officers to remain alert” and ensure minimum inconvenience to people amid the ongoing heavy rainfall.

With Inputs From PTI, ANI