Supplies of breast milk for premature babies from Paris’s central milk bank have been suspended following the deaths of two babies. Tests are under way to establish the origin of the bacteria that caused the deaths.

Supplies of breast milk from Paris’s Necker hospital, which houses the region’s milk bank, were suspended “as a precautionary measure” on Saturday, following the infection of three babies with the Bacillus Cereus bacteria, which is common but can be dangerous for some premature children.

Two of the babies have died but the third has recovered.