MOSCOW, April 21 (Xinhua) -- Russia's Federal Security Service (FSB) on Saturday said it had killed a member from the Islamic State (IS) terrorist group who had plotted to attack local authority buildings.

During an operation on Saturday, the suspect, who had sworn allegiance to IS leader Abu Bakr al-Baghdadi and was planning to attack an administrative building and the FSB local headquarters in southern Stavropol Territory, suffered fatal wounds while putting up an armed resistance, an FSB statement said.

Agents found a rifle, a knife, improvised explosive devices and an IS flag at the scene, the FSB said.