Four children were taken to hospital as a precaution after unidentified tablets were found at a school.
West Yorkshire Police said a woman in her 20s has been arrested in connection with an incident which had occurred on Friday at Holywel Green Primary School, in which some children had come into contact with tablets.
The Force did not say what kind of tablets had been recovered
Calderdale Council’s Director for Adults and Children’s Services Stuart Smith said: “We are aware that some children from a school in Calderdale have attended hospital today and their parents have been informed.”
Police and social workers are investigating the circumstances.

Bletchley Mosque Extension Approved Despite Parking Concerns
Earlier Access to New Halifax Homes Agreed After Planning Change
Two Men Charged With Firearms Offences After Huddersfield and Holmfirth Police Operation
West Yorkshire Police Officer Given Warning Over ‘Unreasonable’ Use of Force During Bradford Arrest
Two People Taken to Hospital After House Fire in Blackburn
TfL Proposes 3km Extension of Cycleway 9 to Hounslow Town Centre
Man Seriously Injured After Wrong-Way M1 Collision Near Wakefield
MP Demands Action After Fifth Major Fire at Keighley’s Dalton Mills
Bradford Rotary Groups Raise Around £4,000 for Nepal Flood Relief
Trust Appointed to Run New Specialist School in Calderdale
Man Arrested After Salford Hit-and-Run Leaves Two in Hospital
Legal Show
Alim OnAir
The Golden Era
Remix Saturdays