Prime Minister Cameron warned that the Islamic State of Iraq and Sham threatens not only the Middle East but is also planning attacks on the UK. The ISIS is estimated to have up to 500 fighters from the UK. The government said it has arrested 65 people in the past 18 months for Syria-related terrorism offenses, including 40 arrests in the first quarter of 2014. Also, between April 2013 and March 2014, the passports of 14 people were seized, mostly to prevent jihadist travel to Syria. Two extremists under police investigation, Abu Aziz, an associate of Anjem Choudary; and Junaid Hussain,of Birmingham, have escaped to Syria. Aziz has since stated his support for ISIS.