A woman in her 30s has been arrested in connection with the death of a two-year-old girl in Cork on Friday morning.
Up to 30 gardaí have been carrying out door-to door inquiries in the investigation into the murder of Santina Cawley in Cork city.
The girl died in hospital on Friday morning.
As well as carrying out door-to door inquiries, Supt Michael Comyn said gardaí have been taking statements and examining CCTV footage from the Boreenmanna Road area in the city since Friday.
A murder inquiry was launched on Saturday following the results of a post-mortem examination.
The child was found in a critical condition in an apartment at the Elderwood complex, on the Boreenmanna Road just before 5.30am.
The apartment, as well as a second property, were sealed off for forensic examination, which was completed yesterday afternoon.
Two cars were also seized for technical examination. It is expected that house-to-house inquiries will finish today.
It is understood it is likely to be Wednesday before the body of the child is released to her family.
Over the weekend, floral tributes and teddy bears were left on the ground close to the entrance to the apartment block.