Overview
- A 25-year-old woman and a 22-year-old man from March were arrested on suspicion of grievous bodily harm and possession of Class B/C drugs.
- Cambridgeshire Police confirmed both have been released on bail and told to return to the police station on April 2.
- Emergency services were called at about 11am on January 3 to a home on St John's Chase in March.
- Medics treated the baby boy at the scene before he was taken to hospital, where he remains in a critical condition.
- Police have not released identities or announced charges as the investigation continues.