The Rotterdam police confirmed on Twitter that the girl who was arrested for tweeting a threat to American Airlines on Sunday was released from prison on Tuesday.

See also: Teen Arrested After Tweeting Terror Threat to American Airlines

American Airlines Twitter threat: Dutch girl released pending further enquiries. #Rotterdam #Police #Force — Politie Rotterdam eo (@Politie_Rdam) April 15, 2014

The 14-year old girl, who tweeted under the handle @QueenDemetriax_, posted what seemed to be a pretty serious threat over the weekend, and she included American Airlines' Twitter handle @AmericanAir.

"Hello my name's Ibrahim and I'm from Afghanistan. I'm part of Al Qaida and on June 1st I'm gonna do something really big bye," she tweeted. She later claimed it was all a joke; her Twitter account is currently suspended.

Rotterdam police confirmed Monday that she has been arrested, and that the investigation is ongoing.

See all her tweets — which have since been deleted — thanks to a Storify by Rachael Perrotta: