A photojournalist has been attacked and raped by five men in Mumbai - widely regarded as India's safest city for women.

The attackers, who police believe were on drugs, allegedly attacked the 23-year-old reporter when she was on an evening assignment with a male colleague in the Shakti Mills area.

The rapists, all thought to be in their early 20s, assaulted the woman and tied up her colleague when he attempted to intervene as they raped her.

The victim told police that they took turns to rape her and threatened to kill both her and her colleague if they raised the alarm.

Vinayak Deshmukh, deputy commissioner of police, told the Hindustan Times: "After the duo clicked photos for around half an hour, two youths emerged there and asked if they had valid permission for clicking photos. Then they offered to take them to the right authority, when three more joined the earlier two youths and in the process separated them.

"While the hands and legs of the male colleague were tied and he was gagged, the accused raped the girl."

The woman works for an English-language magazine, the name of which has not been revealed. She is not British.

One of the five suspects has been arrested, and has confessed to rape. Police said they had tracked down the other suspects after more than a dozen teams of officers were deployed in a massive manhunt.

Meanwhile the victim has been admitted to a nearby hospital where her condition is said to be stable.

RR Patil, interior minister of the state of Maharashtra, of which Mumbai is the capital, told reporters: "The case will be investigated very seriously."