A 50-year-old woman was arrested after officers attended a home on Fryent Crescent in West Hendon on Monday, and a 31-year-old woman was detained in Luton, Bedfordshire. On Tuesday, detectives re-arrested the two women, as well as a 52-year-old man, who was held on suspicion of preventing a lawful and decent burial.
The investigation into the disappearance of the baby, who was born in Barnet in 2004, was requested by local officers and a child abuse investigation team after a case review into the death of another child at an address in Barnet last year.
A Metropolitan Police spokesman said: “Further tests will be undertaken and this could take a number of weeks. We will not speculate on the identity of the child until all further tests have concluded.”