Authorities have searched the homes and workplaces of the two suspects accused of working for a foreign secret service.
Independent bodies have collated information on the death toll in Russia and Ukraine; both are higher than the first year of fighting as losses rise to tens of thousands.
Intelligence sources say that Tehran's growing partnership with Moscow has led to secret weapons deals.
After its drone attack against Israel, Iran seeks to continue building its partnership with Russia, which has slammed the UN Security Council's emergency meeting after the attack.
There’s no need for political or security analysis, just reliable information to establish the truth.
The slowdown in military assistance from the West has left Ukraine more exposed to aerial attacks and heavily outgunned on the battlefield.
Yevgeny Balitsky, the top Moscow-installed official in the Zaporizhzhia region, said that 18 people had been wounded in the shelling on Friday night.
Global tensions rise as reports suggest Iran may target Israel. US, France, Russia, and India issue travel warnings. Israel prepares for potential attacks while reinforcing ties with the US.
According to the FSB's public relations center, the assailant intended to carry out the attack during a period of significant congregation at the religious Jewish institution.
Despite tensions, as of Thursday night, there had been no special instructions given out by the Home Front Command, but that Israelis would be immediately notified of any steps taken.