The woman, who returned to Sweden yesterday was staying in the popular resort of Antalya when the attack happened.
"We know about the case and we are in contact with the relevant authorities, though we have not found out much more than that yet," Swedish foreign ministry spokesperson Teo Zetterman told the Aftonbladet newspaper.
Following a night out, the Swedish teen and her friends decided to share a taxi with a man who worked at the hotel where they were staying.
After the friends returned to their own rooms, the 18-year-old stayed behind chatting alone with the man.
She was then apparently forced into a van and driven away before being repeatedly assaulted.
Her attacker then allegedly drove her to a nearby harbour and once again subjected her to further attacks.
Eventually she managed to return to her hotel to find help and reported the incident to police.
"She was so clearly in shock, but she could identify the offender," a woman who helped the 18-year-old report the attack told the newspaper.
The Turkish police have confirmed that a 25-year-old man who works at the hotel was arrested shortly afterwards on suspicion of rape.