Police in India's capital used water cannons and tear gas to push back thousands of people who tried to march to the presidential mansion in protest at the gang rape of a student on a bus.

Some protesters suffered injuries when they tried to break through steel barricades in a high-security zone in New Delhi.

Police fired tear gas and chased the protesters with sticks, while some of the protesters attacked police with stones.

The protesters were demanding the death penalty for the five suspects who have been arrested by police following the 16 December attack on the 23-year-old woman in New Delhi.

Police are still looking for the sixth and final attacker.

The Indian government said yesterday that it is seeking life sentences for the attackers.

The attack sparked days of protests across the country from women demanding that the authorities take tougher action to protect them against the daily threat of harassment and violence.

Indian officials yesterday announced a broad campaign to protect women in New Delhi.

Some of the protesters carried placards reading "Don't teach not to get raped. Instead teach not to rape".

Police reinforcements rushed to the area as the crowds of protesters swelled this morning on the lawns near Parliament House.

The area is a high-security zone, with the presidential mansion, the prime minister's office and various ministries located there.

The victim and a companion were attacked after getting a ride on a chartered bus.

Police said men on the bus gang-raped the woman and beat her and her companion with iron rods as the bus drove through the city for hours, even passing through police checkpoints.

The assailants eventually stripped the pair and dumped them on the side of a road.

The victim is recovering from injuries in a New Delhi government hospital.