New Delhi

India has received the fourth squadron of the Russian-made S-400 'Sudarshan' long-range air defence system, marking a significant step in strengthening the country's air defence network.

According to defence sources, the latest S-400 unit arrived in India by sea and is expected to be deployed in an operational area shortly.

The delivery is part of the agreement signed between India and Russia in 2018 for the procurement of five S-400 air defence squadrons. While three squadrons had already been inducted, the delivery schedule for the remaining units was affected by disruptions arising from the Russia-Ukraine conflict.

The S-400 system has emerged as a key component of India's air defence architecture. Defence sources indicated that it played an important role during Operation Sindoor, contributing to the country's ability to counter aerial threats and enhance airspace security.

The final squadron under the original contract is expected to be delivered in the coming months, completing the five-unit acquisition programme.

Meanwhile, India is looking to further expand its long-range air defence capabilities. The Defence Acquisition Council (DAC) has reportedly approved a proposal for the procurement of five additional S-400 squadrons.

Alongside foreign acquisitions, India is also advancing efforts to develop a domestic long-range air defence system under Project Kusha. The programme aims to create an indigenous platform capable of intercepting aircraft, missiles and drones at extended ranges comparable to advanced international systems.

Indian defence manufacturer Solar Industries is among the industry partners involved in the development and production of the indigenous project.

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The twin-track approach of acquiring proven systems while investing in domestic capabilities is expected to enhance India's overall air defence preparedness and support long-term self-reliance in the sector.