The city was later burned down by the Sassanid Persians in 615 .
The city was later attacked by the Arabs under second Umayyad Caliph Mu'awiya I in 640 .
The city was later burned down by the Sassanid Persians in 615 , and attacked by the Arabs under second Umayyad Caliph Mu'awiya I in 640 .