Ukraine and Russia: What you need to know right now

* The power station is operating "in normal mode," the Interfax news agency quoted the Russian-installed head of the local administration as saying on Monday. FIGHTING/DIPLOMACY * The United States will provide $1 billion in security assistance for Ukraine, the single largest package using the president's drawdown authority, including munitions for long-range weapons and armored medical transport vehicles, acting Pentagon spokesman Todd Breasseale said on Monday. * Russia has suffered between 70,000 and 80,000 casualties, either killed or wounded, since its invasion of Ukraine began, the Pentagon's Under Secretary of Defense for Policy, Colin Kahl, said on Monday.

Ukraine reported intense Russian shelling across the frontlines as both sides traded blame for the weekend strike on the Zaporizhzhia nuclear complex which triggered international concern about a potential atomic disaster. ZAPORIZHZHIA NUCLEAR COMPLEX

* The head of Ukraine's state nuclear power company Energoatom called for the Zaporizhzhia nuclear power plant to be made a military-free zone, warning of the risk of a Chornobyl-style nuclear disaster after the site was hit by shelling. * The power station is operating "in normal mode," the Interfax news agency quoted the Russian-installed head of the local administration as saying on Monday.

FIGHTING/DIPLOMACY * The United States will provide $1 billion in security assistance for Ukraine, the single largest package using the president's drawdown authority, including munitions for long-range weapons and armored medical transport vehicles, acting Pentagon spokesman Todd Breasseale said on Monday.

* Russia has suffered between 70,000 and 80,000 casualties, either killed or wounded since its invasion of Ukraine began, the Pentagon's Under Secretary of Defense for Policy, Colin Kahl, said on Monday. * Heavy fighting was reported in frontline towns near the eastern city of Donetsk, where Ukrainian officials said Russian troops were launching waves of attacks as they try to seize control of the industrialized Donbas region.

* Around Kharkiv in the northeast, Ukrainian troops captured the town of Dovhenke from Russian occupiers and were advancing towards Izium, Ukrainian Presidential adviser Oleksiy Arestovych said in a video posted on YouTube. * In the southeast, the key Antonovskyi bridge over the Dnipro river in the Kherson region was targeted again by Ukrainian forces trying to disrupt Russian supply lines.

* Ukraine arrested two people working for Russian intelligence services who planned to kill Ukraine's defense minister and the head of its military intelligence agency, Ukraine's domestic security service, the SBU, said on Monday. ECON0MY

* The United States will provide an additional $4.5 billion to Ukraine's government, bringing its total budgetary support since Russia's February invasion to $8.5 billion, the U.S. Agency for International Development said on Monday. * The World Bank said it was mobilizing a $4.5 billion grant for Ukraine provided by the United States that will help Kyiv meet urgent needs created by Russia's invasion, including healthcare, pensions, and social payments.

* Ships exporting Ukraine grain through the Black Sea will be protected by a 10 nautical mile buffer zone, according to long-awaited procedures agreed by Russia, Ukraine, Turkey, and the United Nations on Monday and seen by Reuters. * Russian airlines, including state-controlled Aeroflot AFLT.MM, is stripping jetliners to secure spare parts they can no longer buy abroad because of Western sanctions, four industry sources told Reuters.