* Missiles come from bombers over Caspian Sea- Ukraine's air force
* Target railway infrastructure, presidential adviser says
* Russia: Targets were tanks, armoured cars supplied by West (Adds eyewitness quotes, Energoatom video detail)
By Pavel Polityuk and Max Hunder
KYIV, June 5 (Reuters) - Russia hit Kyiv with cruise missiles fired from the Caspian Sea on Sunday, striking a rail car repair facility in the Ukrainian capital, in the first such attack for weeks, Ukraine's army and the country's railway chief said.
Dark smoke funnelled into the sky above Kyiv's eastern outskirts. At least one person was hospitalised though no deaths were immediately reported, Mayor Vitali Klitschko said.
Ukrainian air defences shot down one incoming missile at around 6 a.m. local time (0300 GMT), the military said.
Kyiv resident Kostyantyn Nikitenko, who lives near the repair facility, said that he immediately took shelter in his apartment’s corridor when he heard several powerful explosions around that time.
“Every 10-30 seconds the next explosions came. With every new explosion, it was more and more powerful, and I got the impression that it was getting closer and closer,” he said, adding that afterwards he saw a 100-metre column of black smoke emerging from behind a nearby building.
“There hasn’t been a strike on Kyiv in a while, and perhaps most people, including myself, developed a kind of illusion that the worst was behind us. But this was a reminder that the war is still going on,” Nikitenko said.
One Russian missile that was probably headed for Kyiv flew "critically low" over a major nuclear power plant in the southern Mykolaiv region, state-run nuclear power operator Energoatom said on Telegram. It later posted a video appearing to confirm its account. Reuters could not independently verify the footage.
Russia's Defence Ministry said its missiles had destroyed T-72 tanks and armoured vehicles supplied to Ukraine by eastern European countries housed in a rail car repair facility in Kyiv.
Oleksandr Kamyshin, head of the Ukrainian railway, confirmed that four missiles had smashed into the Darnytsia rail car repair facility in eastern Kyiv, but said there was no military hardware at the site.
"Their (Russia's) target is the economy and the civilian population," he said.
Moscow has denied targeting civilians in what it calls a "special military operation."
The sprawling railway system has served as a vital lifeline as Russia's Feb. 24 invasion has crippled the Ukrainian economy and severed export routes via the Black Sea.