KYIV, Ukraine (AP) — Associated Press journalists are documenting military activity across Ukraine, where disinformation is spiking during a Russian ground and air offensive. With social media amplifying a torrent of military claims and counter-claims, determining exactly what is happening can difficult. Here’s a look at some of what can be confirmed.

Activity with direct witnesses:

— Russian military vehicles crossing from Belarus into Ukraine at the Senkovka crossing point in the Chernihiv region

— Russian military vehicles crossing a bridge near Tavriysk and Novaya Kakhovka in the southern Kherson region, and Russian military helicopters flying over the area

— Security camera footage showing Russian military vehicles crossing from Crimea into government-held territory at Armyansk checkpoint

— Explosions around Kyiv, and their aftermath

— Helicopters flying over Kyiv, believed to be Russian

— Fire near the headquarters of the Ukrainian intelligence agency

— Explosions in Dnipro in eastern Ukraine

— Explosions near an airfield and bomb depot in Myrhorod in eastern Ukraine, including sounds of shelling.

— A residential neighborhood shelled in Mariupol, a strategic city on the Azov Sea near Russia’s border. The mayor said three people were killed. An anti-aircraft base was also struck, and the mayor said the airport runway nearby was damaged.

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— Fighting in Hostomel, a town 7 kilometers (4 miles) from Kyiv, and home to the Antonov aircraft maker and an airport with a runway long enough to receive all types of aircraft, including the biggest cargo planes

— An exploded shell inside an apartment building in the eastern city of Kharkiv; a resident described the blast and said a neighbor was injured in the leg and taken away by an ambulance

— Just outside the separatist-held areas, in Bakhmut, military officers stationed on the road and crowds lining up at gas stations and banks to prepare to flee

— In Sievierodonetsk, families hiding in a bomb shelter after reports of two explosions

Announced by Ukrainian and Russian authorities:

— Russian forces are moving to seize Chernobyl nuclear plant, site of the world’s worst nuclear accident (Ukrainian president)

— A military plane crashed in the Obukhiv region, about 40 kilometers (25 miles) south of downtown Kyiv. There were 14 people aboard, no determination of casualties. (Ukrainian emergencies ministry)

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— The air bombing of an electrical plant in Tripilya, about 40 kms (25 miles) south of Kyiv, in roughly the same area where the Ukrainian military plane was reported to have crashed earlier (Ukrainian president’s office)

— Russian military says it destroyed 74 Ukrainian military facilities, including 11 air bases (Russia’s Defense Ministry)

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Follow AP’s coverage of the Ukraine crisis at https://apnews.com/hub/russia-ukraine