Tokyo (CNN) -- Police have detained two American men as part of an investigation into the strangling death of an Irish exchange student in Tokyo, Japanese authorities said Sunday. Nicola Furlong, 21, was found dead in a hotel room with one of the men, according to Tokyo police. The men were not charged in Furlong's death. Rather, police arrested the men on suspicion of improperly touching Furlong's friend in a taxi early Thursday, as the four headed back to the hotel, authorities said. Authorities would not say how the four ended up together, but Japanese media reported that the women were attending a Nicki Minaj concert in Tokyo when they met the men and decided to accompany them to their hotel rooms.
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NEW: Nicola Furlong was an "outgoing, bubbly" girl, her parish priest says
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NEW: Her rural Irish community is devastated, the Rev. Jim Fitzpatrick says
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The 21-year-old is found dead in a hotel room with one of the men, police say
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The death is believed to be a result of strangling
@placeholder, described her as an "outgoing, bubbly sort of girl and very well liked," and said she was looking forward to coming home after having been in Japan since October.