Jaguar Land Rover (JLR) has told suppliers that production at its U.K. factories will not begin again until at least September 24, following a massive cyberattack, with industry sources warning the disruption could last into November, according to BBC News.

A criminal investigation is under way into the hack, which occurred more than two weeks ago, forcing JLR to shut down its IT networks, and paralyzing production in its car plants in Solihull and Halewood, as well as an engine facility in Wolverhampton. Production has also ceased at its large factories in Slovakia and China, as well as a smaller facility in India.

JLR, which is owned by India's Tata Motors, has dismissed reports that the disruption may continue for weeks or months as "speculation." 

But, BBC News reports, suppliers, many of whom are small and medium sized businesses, have said they simply do not have the financial resources to cope with an extended shutdown, and that industry experts have said bankruptcies are likely, unless some kind of support is provided.

U.K. union Unite has called for a furlough program to be set up, which would use government money to help pay the salaries of people in the sector who are unable to work due to the stoppage. Meanwhile, the U.K. Commons Business and Trade Committee has asked the U.K. chancellor what plans she has to support vulnerable businesses in the supply chain.