Mon Dec 26, 2016 6:10PM
Indian police arrest activists as they block a road during a protest against a gang-rape in Kolkata on May 31, 2016. (Photo by AFP)
Indian police arrest activists as they block a road during a protest against a gang-rape in Kolkata on May 31, 2016. (Photo by AFP)

Indian police have detained four men accused of drugging and raping an American female tourist at a five-star hotel in New Delhi earlier this year.

“We arrested four of them a few hours ago. And they, as in the tour guide, driver, cleaner and another hotel employee, have been charged with rape," Delhi police spokesman, Dependra Pathak, said on Monday.

The 25-year-old US national was part of a tour group visiting India in April.

Indian police launched a formal probe earlier this month after the victim filed a complaint through an American charity.

The woman, who returned to New Delhi last week, told police her local guide gave her a spiked bottle of water and raped her with four acquaintances inside her hotel room. She has already recorded her testimony in court.

The woman has also told local Indian media outlets that she had no memory of the assault for nearly three months.

"The first two nights I was drugged, physically assaulted and sexually assaulted," she told NDTV news network, adding, "I had no memory of what happened to me while I was in India. I regained my memory three months later around the end of July and that's when I took action."

The assault in April was one of the latest in a series of sex attacks on foreigners in India.

A 35-year-old Japanese tourist was raped in southern India in November.

In June, five men were given life sentences for gang-raping a 52-year-old Danish tourist in New Delhi in 2014.

The incidents have reignited concerns about women's safety in the South Asian country.

Indian students shout slogans as they march toward New Delhi’s chief minister's residence during a protest following the gang-rape of a student in the capital, New Delhi, December 20, 2012. (Photo by AFP)

India is notorious for its history of violence against women, including frequent cases of rape.

The country toughened punishment for sexual violence after the fatal gang-rape of a student on a Delhi bus in 2012, whose death sparked mass protests as well as domestic and international outrage.