Vitori had been suspended from bowling in January 2016 but was permitted to resume bowling in June 2016 after remedial work and a subsequent reassessment.
With Vitori being reported again, he will be required to submit to further testing within 14 days. He is, however, permitted to continue bowling in international cricket until the results of the testing are known.
Details of the ICC regulations for the review of bowlers reported with suspected illegal bowling actions can be found here.
