Brussels:
Two teenagers, aged 16 and 17, were arrested in Belgium and are accused of pledging allegiance to the ISIS group and plotting to attack police officers with knives, prosecutors said.
The two men were arrested on Saturday evening in the eastern town of Eupen, near the border with Germany, and are being held in a juvenile detention center.
Belgian public broadcaster RTBF said they recorded videos of themselves swearing loyalty to ISIS.
The IS group claimed responsibility for the gunshot attack carried out Monday in Vienna by a Macedonian Austrian, which left four dead.
Belgium has already been targeted by ISIS, notably in March 2016 when suicide bombers killed 32 people and injured 340 others in explosions at Brussels airport and at a metro station in the capital.
In May 2018, a radicalized man murdered two police officers and a student in an attack claimed by the ISIS group.