The sixth person arrested is a minor and is at a juvenile home.
Two weeks ago, they assaulted the girl and her male friend with an iron rod on a bus usually used to transport school children. The driver of the bus took it for a spin with his friends, and when they saw the couple waiting on the road side, they pulled up and posed as a chartered bus, commonly used in Delhi to supplement public transport. After their depraved attack, they dumped the couple on a road.
The girl was assaulted so relentlessly that she had to go through three major surgeries; she also had a cardiac arrest and what doctors described as "a serious brain injury."
She was flown on an air ambulance to Singapore on Wednesday night.