Original sentence: By 12 May 2013, nine Turkish citizens, wich Turkish officials alleged have links to the Syrian intelligence agency, had been detained.On 30 September 2013, several Turkish media websites published that the Islamic State of Iraq and the Levant (ISIL), the al-Qaeda group operating in Iraq and Syria, claimed responsibility for the attack, threatening further attacks against Turkey
Edited sentence: By 12 May 2013, nine Turkish citizens, alleged to have links to the Syrian intelligence agency, had been detained.On 30 September 2013, some websites claimed that the Islamic State of Iraq and the Levant (ISIL), the al-Qaeda group operating in Iraq and Syria, accepted responsibility for the attack, threatening further attacks against Turkey