WP:

Thousands of Shiite Muslims from Afghanistan and Pakistan are being recruited by Iran to fight with President Bashar al-Assad’s forces in Syria, lured by promises of housing, a monthly salary of up to $600 and the possibility of employment in Iran when they return, say counterterrorism officials and analysts.

These fighters, who have received public praise from Iran’s supreme leader Ayatollah Ali Khamenei, even have their own brigades, but counterterrorism officials in both countries worry about the mayhem they might cause when they return home to countries already wrestling with a major militant problem.

In Afghanistan, stepped-up attacks on minority Shiites claimed by the upstart Islamic State group affiliate known as Islamic State in the Khorasan Province could be payback against Afghan Shiites in Syria fighting under the banner of the Fatimayoun Brigade, Toumaj said. Khorasan is an ancient name for an area that included parts of Iran, Afghanistan, Pakistan and Central Asia.

Pakistan too has an uneasy relationship with Iran. On occasion the anti-Iranian Jandullah militant group has launched attacks against Iranian border guards from Baluchistan province. In June, Pakistan shot down an Iranian drone deep inside its territory.

In Pakistan the worry is that returning fighters, including those who had fought on the side of IS, could start another round of sectarian bloodletting, said the intelligence official.

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