Russia's FSB security service

Britain's Prime Minister Keir Starmer, left, and Foreign Secretary David Lammy step from their aircraft as they arrive at Joint Base Andrews, Md., ahead of talks with U.S. President Joe Biden on resolving the conflicts in Ukraine and Gaza, Thursday, Sept. 12, 2024. (AP Photo)

Ksenia Karelina, also known as Khavana speaks with her lawyer standing in a glass cage in a court room in Yekaterinburg, Russia, Thursday, Aug. 15, 2024.

Ukraine said Tuesday it would not hold on to Russian territory captured in its surprise cross-border incursion and offered to stop raids if Moscow agreed a "just peace."

Russia on Saturday said it had arrested 11 people — including four gunmen — over the attack on a Moscow concert hall claimed by ISIL, as the death toll rose to 133.

Russia's FSB security service said Thursday it had killed ISIL militants who were planning a "terrorist attack" on a Moscow synagogue, Russian state news agencies reported.

The FSB said an ISIL cell based in Kaluga, southwest of Moscow, had been planning to shoot Jewish worshippers at a synagogue in the capital.

A Russian agent sent to tail opposition leader Alexey Navalny has revealed how he was poisoned in August - with the lethal nerve agent Novichok planted in his underpants.

Former militants from "bandit units" in Syria are now a real threat after the defeat of Islamic State, as many of them may be now planning to return to Russia, the RIA news agency cited the head of Russia's FSB security service as saying on Tuesday.

Russia's FSB security service said on Monday it had detained members of what it said was an Islamic State sleeper cell in the Moscow region that had been planning to launch a series of high-profile attacks on the country's transport system, reported Reuters. 

The Kremlin said for the first time on Nov. 17 that a bomb had ripped apart a Russian passenger jet over Egypt last month and promised to hunt down those responsible and intensify its air strikes on Islamist militants in Syria in response.