Hyderabad-based drugmaker Dr. Reddy’s Laboratories Ltd said it had isolated all its data center services as a preventive measure following a cyber-attack. Due to the incident the Indian pharmaceutical giant, which produces COVID-19 treatments remdesivir and favipiravir and has recently received approval to conduct trials of Russia’s Sputnik-V vaccine has been forced to shut down operations at several global facilities.

“We are anticipating all services to be up within 24 hours and we do not foresee any major impact on our operations due to this incident," Dr. Reddy’s chief information officer Mukesh Rathi said in a stock exchange filing.

According to a report from business news channel ETNow, the company suffered a “mega data breach,” which led to the closure of key units across the UK, the US, Brazil, India, and Russia.

A source with knowledge of the situation said that Dr. Reddis has been hit with a ransomware attack, which resulted in all servers being shut down. The serialization process, dispatches, quality control result recordings, and approval processes through electronic systems were also put on hold, the source said.

The company refused to comment on whether or not its manufacturing facilities had been affected.