She was crossing the road aiming to catch the last bus home when she was hit by a taxi.

Madam Tay Kiat Eng, 65, a part-time KFC worker, died en route to Tan Tock Seng Hospital.

The police told The New Paper on Tuesday that the accident occurred in Bukit Timah Road towards Woodlands Road at 12.28am on Nov 27 and a 69-year-old cab driver has been arrested.

The police said they are investigating the case. Mr Richard Poh, 29, the youngest of Madam Tay's four children, is appealing for witnesses to come forward and help.

Mr Poh, who is studying in Melbourne, last saw his mother at lunch two years ago when he came back to Singapore for a short visit.

Upon receiving news of her death, he scrambled to book the next available flight home and arrived on the same day of the incident. He said: "I was shell-shocked when I found out. I didn't get to spend enough time with her, my biggest regret is not being able to come back to take care of her after I graduate."

According to passers-by, two passengers rushed out of the taxi after the accident to help Madam Tay, who was moaning in pain before losing consciousness.

ComfortDelGro's group chief corporate communications officer Tammy Tan said the company has contacted the woman's next of kin to assist them. "The hiring agreement of the cabby has also been terminated and we are assisting the police in their investigations."