Russia's Federal Security Service

Border towns in the Kursk and Belgorod regions have become battlegrounds, with conflicting reports emerging from the frontlines.

The US embassy in Russia has warned that "extremists" have immediate plans to attack Moscow, hours after Russian security services said they had thwarted a planned shooting at a synagogue by a cell of the Afghan branch of the Islamic State.

The US and British embassies in Moscow have issued warnings of potential terrorist attacks targeting large gatherings in the Russian capital. The US Embassy urged American citizens to avoid crowded areas in Moscow over the next 48 hours, citing unspecified extremist threats.

Day 656 of the invasion of Ukraine. Summary of key events in the last 24 hours:

Namely, as the British express.co.uk published as exclusive news, the overthrow of the Russian president from power is underway.

The military channel "Zvezda" released a video of the arrest of a Bulgarian with Ukrainian citizenship, who was detained yesterday in Russia by anti-terrorists. The video shows a man being handcuffed in front of a silver Volkswagen van with a registration number from Plovdiv. You can hear how the man wants to put on some pants first.

Russia's Federal Security Service (FSB) says it has arrested a group of saboteurs suspected of plotting assassination attempts against senior officials in annexed Crimea. The case involves seven people - Ukrainians, Russians and one Bulgarian.

Russia's security service arrested an American reporter for The Wall Street Journal on espionage charges, the first time a U.S. correspondent has been detained on spying accusations since the Cold War. The newspaper denied the allegations and demanded his release.

Here are the highlights of events related to the war in Ukraine over the past 24 hours:

Moscow blamed Ukraine's military intelligence for the Crimean bridge explosion

Russia on Aug. 22 declared Ukrainian intelligence responsible for the brazen car bombing that killed the daughter of a leading right-wing Russian political thinker over the weekend. Ukraine denied involvement.