A 34-year-old man of Indian-origin Prabhu Ramamoorthy was arrested by federal authorities in Michigan after a woman co-passenger complained of being sexually assaulted by him after falling asleep on the flight.

Prabhu allegedly groped the 22-year-old seated next to him on a Spirit Airlines flight from Las Vegas which landed in Detroit early on January 3, the Washington Post reported.

The man, Prabhu Ramamoorthy, who prosecutors said is an Indian national living in the United States on a temporary visa, was charged with aggravated sexual abuse and held without bail after an appearance in federal court in Michigan on Thursday. The victim told investigators that she woke up to find her pants and shirt unbuttoned and the man’s hand inside her pants. Federal prosecutor Amanda Jawad said that Ramamoorthy sat between his wife and the victim. He stopped after the victim woke up, and the woman went to the back of the plane to report the incident to a flight attendant, the criminal complaint said. Two flight attendants told federal investigators that the victim was crying and that her shirt was untied and that her pants were unbuttoned when she reported the incident at about 5:30 a.m., 40 minutes before the plane’s landing, Jawad said. The attendants kept the woman in the back of the plane and offered her a different seat, and while they were talking to the victim, Ramamoorthy’s wife came to the back to see what was going on, Jawad said. Ramamoorthy was arrested after the plane landed, according to court documents. He told agents in a written statement that he had taken a pill and fallen into a deep sleep, Jawad said, and that he hadn’t done anything besides learning from his wife that the 22-year-old woman was sleeping on his knees.

Magistrate Judge Steven Whalen, who said it was a “very unusual case,” ordered Ramamoorthy to be held pending trial after Jawad successfully argued that he was a flight risk and a potential danger to others around him. The prosecutor said that Ramamoorthy’s wife, who was also living in the United States on a temporary visa, would not make a suitable custodian for him.

Prosecutors said Ramamoorthy, who hails from Tamil Nadu was living in the United States on a temporary visa. He was charged with aggravated sexual abuse and held without bail after an appearance in federal court in Michigan on Thursday.

In another unrelated news, Times of India reported that an Indian doctor has been sentenced to 10 months behind bars in the US for groping two teenage female patients and faces deportation to India after the completion of his jail term.

Arun Aggarwal, 40, was sentenced on Thursday after pleading guilty to four counts of gross sexual imposition.