The relationship between the 11-month-old baby and those arrested has not been confirmed.
It is believed the girl was not at her home address at the time of the incident.
Nobody else was injured during the attack.
More top news
The unknown man was found on the street outside University College Hospital in London after suffering a heart attack on Boxing Day.
'Amateurish and incompetent' thieves Jason Baccus and Kevin Downton shot businessman Guy Hedger during a bungled robbery.
Rain bearing frontal systems move in from the west overnight tonight. Much milder across the UK.