More than 21,500 Syrian refugees had fled the violence in their home country and registered in neighbouring Iraq as of Friday, according to the UN Refugee Agency (UNHCR).
The UNHCR's Syria Regional Refugee Response website said that 21,744 Syrians have registered in Iraq, while the number still waiting to register is unknown, meaning that the total number of Syrian refugees in Iraq is likely to be higher.
President Bashar al-Assad's deadly crackdown on the uprising against his rule has sparked an exodus of Syrians to neighbouring states.
According to the UNHCR, most of the registered Syrian refugees in Iraq -- 13,997 -- are in Dohuk province which hosts the Domiz refugee camp and which is one of the three provinces that make up the autonomous Kurdistan region.
Anbar, which shares a long border with Syria and hosts Al-Qaim refugee camp, has 4,271 registered refugees, while Arbil and Sulaimaniyah, the two other provinces in the Kurdistan region, have 2,984 and 492 respectively.