NEW DELHI — Indian Prime Minister Manmohan Singh pledged on Thursday to take action to protect the nation’s women while the young victim of a gang rape on a New Delhi bus was flown to Singapore for treatment of severe internal injuries.

The Dec. 16 rape and brutal beating of the 23-year-old student triggered widespread protests, including a march on Thursday demanding a government crackdown on the daily harassment Indian women face, ranging from groping to severe violence. Some protesters have called for the death penalty or castration for rapists, who under current laws face a maximum punishment of life in prison.