
His comments, in a speech at the opening of the annual Shangri-La Dialogue security summit, come two days after the Ministry of Home Affairs announced it had detained M Arifil Azim Putra Norja’i, and arrested another 17-year-old student who had been radicalised for further investigations.
The ministry had said Arifil gave considerable thought to how he would attack key facilities and assassinate government leaders, but did not go into details.
On Friday, Mr Lee said of his case: "This is why Singapore takes terrorism, and in particular ISIS, very, very seriously. The threat is no longer over there, it is over here."
Mr Lee also announced that Singapore’s deployment of a KC-135 tanker refueling aircraft to the Middle East started on Friday. The tanker is part of Singapore’s participation in the international coalition against ISIS.