THE HAGUE — Dutch police have arrested a teenage girl after she allegedly tweeted a threat to American Airlines posing as an al-Qaeda member.Sarah apparently posted the message that landed her in hot water on social network Twitter on Sunday morning."Hello, my name's Ibrahim and I'm from Afghanistan. I'm part of Al Qaeda and on June 1st I'm gonna do something really big bye," read the message, which has since been deleted together with her account.American Airlines then responded on Twitter, saying "Sarah, we take these threats very seriously. Your IP address and details will be forwarded to security and the FBI."'False alarming'The girl has been charged with "posting a false or alarming announcement" under Dutch law, but the consequences of the accusation remain unclear.The teenager turned herself in at a police station in the Dutch port city of Rotterdam on Monday afternoon after authorities launched an investigation into her whereabouts, Rotterdam police department spokesman said.The girl has been charged with "posting a false or alarming announcement" under Dutch law, but the consequences of the accusation remain unclear.Rotterdam police said they are in contact with several agencies, but did not confirm if the FBI or any other American agency may be involved in the investigation.Twitter has suspended the account immediatelyAmerican Airlines stood by their actions Monday despite the girl's appeals on Twitter, including one message that reportedly read "I'm so sorry I'm scared now."Twitter has suspended the account associated with "@QueenDemetriax_."Twitter doesn't allow users to "make direct, specific threats of violence against others," according to its abusive behavior policy, which is part of its Twitter rules.