NEW DELHI -- A Swiss woman who was on a cycling trip in central India with her husband has been gang raped by eight men, police said Saturday.

The attack comes three months after the fatal gang rape of a woman aboard a New Delhi bus outraged Indians.

Authorities detained and questioned 13 men in connection with the latest attack, which occurred Friday night as the couple camped in a forest in Madhya Pradesh state after bicycling from the temple town of Orchha, local police officer R.K. Gurjar said.

The men beat the couple and assaulted the woman, he said. They also stole the couple's mobile phone, a laptop computer and 10,000 rupees ($185).

The woman, 39, was treated at a hospital in the nearby city of Gwalior, Gurjar said.

Police detained 13 men and questioned them, Gurjar said. Six were released after questioning. No other details were immediately available.

Indian television stations showed scores of police searching the forest where the attack occurred.

Swiss Foreign Ministry spokesman Tilman Renz described the case as "deeply disturbing" and said Swiss diplomats were assisting the couple.

The diplomats called on Indian authorities "to do everything to quickly find the perpetrators so that they can be held accountable," Renz said in a statement.

Last month, the Swiss government issued a travel notice for India that included a warning about "increasing numbers of rapes and other sexual offenses" in the South Asian nation.

India has seen outrage and widespread protests against attacks on women since December's fatal gang rape of a young woman on a moving bus in New Delhi, the capital. The crime horrified Indians and set off nationwide protests about India's treatment of women and spurred the government to hurry through a new package of laws to protect them.

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