The child died on Thursday in the hospital’s intensive care unit.
An unnamed nurse has been arrested on suspicion of “poisoning” an infant.
The 27-year-old nurse working at Birmingham Children’s Hospital has been suspended by the trust as West Midlands Police carry out their investigations.
Police revealed the child died on Thursday in the hospital’s intensive care unit.
Birmingham Women’s and Children’s NHS Foundation Trust have confirmed they referred the case to Police to fully investigate events, in line with their safeguarding policy.
It is understood that following that referral the nurse was arrested on suspicion of administering poison with the intent to endanger life.
The death of an infant.
A formal investigation by the Trust and Police is now underway.
A statement by West Midlands Police explained, “We’ve arrested a 27-year-old woman in connection with the death of an infant.
“The child sadly passed away on Thursday at hospital.
“The woman was arrested on Thursday evening at a property in the West Midlands area on suspicion of administering poison with intent to endanger life.
“She has been released while the investigation continues and the results of forensic tests are examined.
“The family of the child are being supported by specially-trained officers.”