Two Indian girls aged two-and-a-half and five years old were raped in separate incidents in New Delhi overnight, with at least one confirmed as a gang rape, police said Saturday.

"We have launched a manhunt for the suspects. So far no one has been arrested," west Delhi police chief Pushpendra Kumar told AFP of the younger girl's case, saying tests confirmed the toddler had been raped at least once.

In a separate incident, a five-year-old girl was gang-raped by three men in New Delhi's eastern Anand Vihar area on Friday night, police said.