Authorities detained and questioned 13 men in connection with the latest attack, which occurred Friday night as the couple camped out 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 gang-raped the woman, he said. They also stole the couple's mobile phone, a laptop computer and 10,000 rupees ($185).
The woman was treated at a hospital in the nearby city of Gwalior, Gurjar said, adding that she and her husband apparently suffered no major injuries.
A photo showed the woman -- her identity concealed with a hood -- walking while being escorted by police to the hospital.
Police detained 13 men and questioned them, he said. Six of the men were released after questioning. No other details were immediately available.
Indian television stations showed scores of police searching the forest where the attack occurred.
India has seen outrage and widespread protests against rape and 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.
Copyright 2013 The Associated Press.