Ukraine's President Volodymyr Zelenskyy sidelined his childhood friend as the country's top security service chief and another close ally as the head of the Prosecutor General's Office in the biggest internal purge of the war, citing their failure to root out Russian spies.
Ivan Bakanov, head of the powerful SBU security agency, and Iryna Venediktova, the prosecutor general, had been emblematic of Zelenskyy's policy of putting young loyalists in charge of combatting corruption since sweeping to power in 2019.
But nearly five months after Russia's invasion, the president acknowledged that his two allies had failed to root out traitors and collaborators in their organizations.
Zelenskyy said on Sunday the two had been removed from their posts. The deputy head of Zelenskyy's administration clarified on Monday that they had been suspended pending further investigation, rather than fired.
More than 60 officials from the SBU and prosecutor's office were working against Ukraine in Russian-occupied territories, and 651 treason and collaboration cases had been opened against law enforcement officials, Zelenskyy said in a video address.
"Such an array of crimes against the foundations of the national security of the state ... pose very serious questions to the relevant leaders," Zelenskyy said. "Each of these questions will receive a proper answer.
Zelenskyy, now widely feted on the world stage as a decisive war-time leader, had been dogged before the invasion by accusations that he had named inexperienced outsiders, including friends, into jobs in which they were out of their depth.
Bakanov, a friend of Zelenskyy's since their childhood in southern Ukraine, had helped run Zelenskyy's media business during his television career. He then led the successful campaign that saw Zelenskyy shift from playing the president on a sitcom to being elected in a landslide in real life.
Venediktova, who attended a meeting just last week in The Hague discussing the international effort to prosecute Russian war crimes in Ukraine, had advised Zelenskyy on judicial reform since he entered politics.
In his nightly speech to the nation, Zelenskyy noted the recent arrest on suspicion of treason of the SBU's former head overseeing the region of Crimea, the peninsula annexed by Russia in 2014 that Kyiv and the West still view as Ukrainian land.
Zelenskyy said he had fired the top security official at the start of the invasion, a decision he said had now been shown to be justified.
"Sufficient evidence has been collected to report this person on suspicion of treason. All his criminal activities are documented," he said.
After failing to capture the capital Kyiv early in the invasion, Russian forces used a campaign of devastating bombing to extend their control of the south and east.
In recent weeks the Russians have stepped up long-distance strikes on targets far from the front, killing large numbers of civilians in what Ukraine calls terrorism. Moscow says it is firing at military targets.
Zelenskyy said Russia had used more than 3,000 cruise missiles to date and it was "impossible to count" the number of artillery and other strikes so far.
Dozens of relatives and local residents on Sunday attended the funeral of 4-year-old Liza Dmytrieva, one of 24 people killed in a Russian missile strike in the city of Vinnytsia last week. The death of the girl, who had Down syndrome and was filmed cheerfully pushing a pram the morning before she was killed next to it, has had particular resonance across Ukraine.
Kyiv hopes the war is at a turning point, with Moscow having exhausted its offensive capabilities to seize a few small cities in the east, and long-range Western weapons now giving Ukraine the capability to strike arms depots behind Russian lines.
Kyiv cites a string of successful strikes carried out on 30 Russian logistics and ammunition hubs, which it says are crippling Russia's artillery-dominated forces that need to transport thousands of shells to the front each day.
Russia said on Monday that Defense Minister Sergei Shoigu had ordered the military to concentrate on destroying Ukraine's Western-supplied rockets and artillery.
In the south, Ukraine is preparing a counterattack in the coming weeks aiming to recapture the biggest swath of territory taken since the February invasion that is still in Russian hands.
Ukraine's southern Operational Command reported that in the Kherson region, it had destroyed two Russian Pantsir missile systems, three strategic communication systems, one radar station, two ammunition depots and 11 armored and military vehicles on Sunday.
In the east, Ukrainian forces withdrew at the start of July from Luhansk, one of two provinces that Russia claims on behalf of its separatist proxies. Kyiv says Moscow is planning another assault to capture the last Ukrainian-held pocket of neighboring Donetsk province.
Ukraine's general staff said its forces had repelled Russian attacks in several towns there.
"Fighting is currently ongoing near Hryhorivka near the administrative between Luhansk and Donetsk regions," it said.
Russian President Vladimir Putin launched his invasion on Feb. 24 calling it a "special military operation" to demilitarize its neighbor and root out nationalists. Kyiv and the West call it an attempt to reconquer a country that broke free of Moscow's rule in 1991.