Update — April 15, 2:25 p.m. ET:
The Rotterdam police said that the Dutch teen was released Tuesday, April 15, after an initial court hearing.
Dutch police had arrested the teenager Monday after she tweeted threats to American Airlines is in custody.
An official spokesperson told Business Insider:
We're not in a state that we can communicate any state of charges at this point, we just thought it was neccessary to bring this out mostly because of the fact that it caused a great deal of interest on the Internet.
Twitter's Guidelines for Law Enforcement say user information may be turned over "if there is an exigent emergency that involves the danger of death or serious physical injury to a person that Twitter may have information necessary to prevent."
On Sunday, a 14-year-old named Sarah tweeted the following:
She deleted the initial tweet on Sunday. Her entire account has since disappeared from Twitter. Twitter would not comment on whether it had removed the account and referred BuzzFeed to its Guidelines for Law Enforcement.
American Airlines was not amused.
American Airlines deleted its tweet.