POLICE investigating an incident which left an 18-month-old girl seriously ill at her home have released two people on bail.

The 24-year-old man and 23-year-old woman were arrested last night, Cleveland Police said.

The toddler remains in the intensive care unit of the James Cook University Hospital, Middlesbrough, after falling sick in Hartlepool at 5.30pm on Wednesday.

A police spokeswoman said: "Her condition is described as improving."

Yesterday, police officers carried out searches of a house in Harwich Grove, Seaton Lane, Hartlepool, where the incident took place.

Police refused to speculate on reports that the child might have taken cannabis.

She was first taken to the University Hospital of Hartlepool, before being transferred to Middlesbrough.

The investigation is being led by Detective Sergeant Matt Mason of the Child Abuse Investigation Unit.

A spokesman for Hartlepool Borough Council would not comment on the incident and said it was a matter for the police.