Pharmaceutical company Dr Reddy's, which is developing a Covid-19 vaccine, says it has been hit by a cyber-attack.
Sites around the world have been affected, including those in the UK, Brazil, India, Russia and the US.
The India-based company said it had isolated all of its data centre services to contain the attack.
Last week, Dr Reddy's was given permission to begin its final stage trials of Russia's Sputnik V Covid-19 vaccine.
The company refused to comment on whether or not its manufacturing facilities had been affected.
Chief information officer Mukesh Rathi said: "In the wake of a detected cyber-attack, we have isolated all data centre services to take required preventive actions.
BBC News
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