Pharmaceutical giant GlaxoSmithKline is under criminal investigation here in the UK, the company said.
The London-based multinational corporation said the Serious Fraud Office has opened a "formal criminal investigation".
The company is facing similar investigations in Iraq and China.
More top news
The 53-year-old was killed shortly after leaving her home in Mosta, Prime Minister Joseph Muscat said.
Jordi Sanchez of the Catalan National Assembly and Jordi Cuixart of the Omnium Cultural group were jailed on Monday.
Storm Ophelia continues to bring strong winds to western parts.