Dutch police said on Friday they had received 25 tips about the missing American teenager who flew to Amsterdam on April 1 and has since vanished.

‘We have no idea where she is and the investigation is in full swing,’ a police spokeswoman told broadcaster NOS. The FBI and Interpol are involved in the hunt for the 16-year-old.

Maggie Lee left her home in Springfield Tennessee with her passport and is now known to have boarded a plane for the Netherlands. The Dutch police website says she is half Korean, half white and suffers from acne. She may also be going by the name Sandra Lee.

Her mother Sabrina, who is now in the Netherlands, says the girl may have fallen in love, possibly with someone in The Hague whom she met via Facebook. According to local broadcaster Omroep West, she had been involved in an online chat with someone from The Hague shortly before leaving.

The girl also tried to fly to the Netherlands in February but was stopped by police at Nashville airport. ‘I think she is in love and that she believes if she is here, she will be in a sort of paradise where you don’t have to go to school,’ Sabrina Lee told Omroep West.

After the February escapade, ‘I told her how dangerous doing something like this to chat to someone of Facebook and what can happen. And I thought she understood me,’ Sabrina said.

It is unclear how a 16-year-old American girl was able to enter the Netherlands without any flags being raised.