The woman, 39, was treated at a hospital in the nearby city of Gwalior.
A police officer in Gatia district told Associated Press today that the men have admitted to the crime.
He spoke on condition of anonymity because he was not authorised to speak to the media.
India was outraged last year by the fatal gang-rape of a medical student on a moving bus in the capital, New Delhi. The attack set off nationwide protests about India’s treatment of women and pressured the government into hurrying through new legal protections.
Friday’s attackers struck as the couple camped in a forest near Jatia village in the central Madhya Pradesh state. They had cycled from the temple town of Orchha.
They were on a three-month holiday, and planned to cycle to Agra to visit the Taj Mahal, nearly 130 miles away.
They told police the woman was raped by seven or eight men armed with sticks, but that it was dark and they could not be sure of the exact number.
The men beat up the husband, tied him to a tree and then raped the woman, police said.
They stole the couple’s mobile phone, a laptop and 10,000 rupees (£120).
The Swiss ambassador in India, Linus von Castelmur, has spoken to the couple and has demanded a swift investigation of the incident.
He said he was “most distressed” by the incident and has assured the couple of the Swiss government’s help and support.
“Their health and treatment is the priority of the moment,” the Swiss embassy said in a statement.
Police question 20 men after Swiss tourist gang-raped in central India – The Independent
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