A private memorial service has been held following the murder of a 17-year-old Swiss student in Galway.

People in the city have been signing a book of condolences throughout the day.

Manuela Riedo, from Hinterkappelen near Berne, arrived in the city last weekend to begin an English language course.

Her body was found on open ground close the railway line at Lough Atalia two days ago. She had been staying in nearby Renmore and a post mortem examination later found that she had been strangled.

On the third day of the investigation into her death, a book of condolence was opened at the Galway Language Centre.

The Garda Superintendent leading the investigation has said it is unlikely that her parents will be coming to Ireland in the coming days.

However Superintendent Tom Curley said a garda liaison officer had been speaking at length with her parents.

Gardaí have issued a detailed description and have appealed for information from anyone who may have seen Ms Riedo on Sunday or Monday night.

Ms Riedo was 1.64m (5'4") tall, with brown shoulder length hair.

When last seen she was wearing calf-length black suede boots, a grey sleeved top with narrow pink stripes and a red and black cardigan, which had two black sleeves and a diamond black shape on the back.

She was also wearing a waist-length ladies wool coat, grey and black herringbone and grey jeans.

Ms Riedo was carrying a distinctive large black handbag with a cherry pattern with green leaves.

She had a small diamond stud in the left side of her nose and wore a silver band on her middle finger.