Singapore  - A second woman died Wednesday after a food-poisoning outbreak hit Singapore last week, a radio report said.

Norani Kassim, 59, who was admitted to hospital Saturday, died after lapsing into a coma, hospital officials told the local 938LIVE station.

Aminah Samijo, 57, died Monday while another woman lost her 2-month-old foetus after suffering food poisoning by eating a salad at a food stall.

News reports said 137 people had suffered food poisoning after eating the salad of meat and deep-fried vegetables called India rojak from a popular hawker stall last week.

The government has initiated an investigation of the stall operators while the entire market where it was located has been closed for cleaning.

It was the worst mass food-poisoning case in Singapore since 2007 when bakery operator Prima Deli was implicated in a case in which more than 150 people fell sick. (dpa)