Britain's biggest carmaker Jaguar Land Rover is extending the closure of its factories until October 1 following a cyberattack in early September that has left its operations paralysed and smaller suppliers struggling.

The luxury carmaker, owned by India's Tata Motors, has three factories in Britain, which together produce about 1000 cars per day.

The company is losing 50 million pounds ($102.5 million) a week, according to the BBC, with many of its 33,000 staff told to stay at home.

The breach highlights the vulnerability of global businesses and government departments to increasingly sophisticated and more frequent cyber and ransom attacks, affecting sectors from healthcare and defence to finance and retail.

No details have been released about who might be behind the attack on JLR.

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