A 14-year-old boy suspected of planning a series of bombings in Vienna was reported to have been offered $25,000 (£16,000) by the ISIL to carry out the attacks amid claims that two other youths recruited in the same way remain at large.
The arrested youth has not been named by authorities, but has been identified by the Austrian media as Mertkan G, the son of Turkish immigrants, who has lived in the country for eight years.
Among the sites in which he has admitted planning to plant explosives is Vienna's Westbahnhof station, one of the busiest in the country, used by 40,000 travellers each day.
Austrian officials have refused to comment on reports that he was recruited over the internet by the iSIL, But a spokesman for prosecutors said that the 14-year-old was in touch with "various different contacts".
He had confessed to planning to plant a series of bombs in crowded areas around Vienna, said Michaela Obenaus, a spokesman for the prosecutors' office in the boy's home city of St Pölten.