SEVASTOPOL, Crimea — Sailing into this Black Sea port Friday amid a jubilant spectacle of fighter jets and warships, President Vladimir Putin celebrated the return of Crimea to Russia as ‘‘historic justice’’ during a Victory Day display of military pomp and patriotism.
The gravity of the crisis gripping the rest of Ukraine was underscored by deadly clashes in the east, where fighting left bodies in the streets of the seaside city of Mariupol and the police station a smoldering ruin.
At least seven people were killed and dozens injured in the city, one of at least a dozen where pro-Russian insurgents are agitating to follow Crimea’s lead in seceding from Ukraine.
Speaking before a cheering crowd of thousands on a triumphant first visit to Crimea since its annexation into Russia, Putin hailed the incorporation of its 2 million people as a ‘‘return to the Motherland’’ and a tribute to the ‘‘historical justice and the memory of our ancestors.’’
The Russian leader’s visit to the Crimean port of Sevastopol, where Russia’s Black Sea Fleet is based, came on Victory Day, which commemorates the defeat of Nazi Germany and is Russia’s most important holiday. The trip was strongly criticized by the United States, NATO, and Ukraine’s Foreign Ministry, which said it trampled on Ukraine’s sovereignty and international law.
Putin’s two Victory Day celebrations — a massive show of military muscle in the annual Red Square parade in Moscow, followed by the extravaganza in Sevastopol — rubbed salt in the wounds of Ukraine’s interim government in Kiev without ever once mentioning its name.
In Sevastopol, Putin rode a cabin cruiser-type boat past hulking warships, issuing greetings to their crews, as warplanes and helicopters swooped over the vast harbor. He then stepped onto land for a short address to the tens of thousands on the shore who came to watch the spectacle.
He expanded on the theme of righting a historic wrong with Crimea’s return to Russia in a later address at a commemorative concert, saying Moscow respected other countries’ interests and ‘‘we ask that all of them show regard for our legal interests, including the restoration of historical justice and the right to self-determination.’’
Conquered by Russia in the 18th century under Catherine the Great, Crimea only became part of Ukraine in 1954 when Soviet leader Nikita Khrushchev transferred jurisdiction from Russia. The move was a formality until the 1991 Soviet collapse meant Crimea landed in an independent Ukraine. It remained under Ukrainian control until its annexation by Russia in March, following a hastily arranged referendum — moves condemned by the West and Kiev.
The violence in the strategic port of Mariupol on the Azov Sea — along the main road between the Russian border and the Crimean Peninsula — was a clear sign of increasing unrest in eastern Ukraine.
The Donetsk region, which includes Mariupol, and the neighboring Luhansk region are to hold a hastily organized referendum Sunday on declaring sovereignty, a move likely to deepen the crisis between supporters of Ukraine’s fledgling government and pro-Russia insurgents who claim the authorities in Kiev are a fascist junta.
There were varying accounts of Friday’s violence in the city of a half-million people that also was hit by unrest last month.
Ukrainian Interior Minister Arsen Avakov said about 60 gunmen attacked the Mariupol police station and were repulsed in an operation that killed one policeman and about 20 people he called ‘‘terrorists.’’
The Donetsk regional government said seven people were killed and 39 others were wounded.
The conflicting death tolls could not be reconciled. An Associated Press reporter saw three bodies in the street — one of them covered by a blanket with a policeman’s hat placed at the head.
As the police station burned, residents gave accounts of the day’s events that contradicted the official line. Some said government troops fired on unarmed protesters and attacked police who were protecting demonstrators occupying the nearby administration headquarters.
Government troops appeared to have lost an armored personnel carrier to attacking mobs. By nightfall, all government forces had abandoned the city center, which was blocked off with barricades of tires.
US State Department spokeswoman Jen Psaki condemned the violence, which she said was ‘‘caused by pro-Russia separatists.’’
‘‘We continue to call for groups who have jeopardized public order by taking up arms and seizing public buildings in violation of Ukrainian law to disarm and leave the buildings they have seized,’’ she said.
Meanwhile, the Obama administration and NATO Secretary General Anders Fogh Rasmussen condemned Putin’s visit to Crimea.
‘‘We still consider Crimea as Ukrainian territory and from my knowledge the Ukrainian authorities haven’t invited Putin to visit Crimea, so from that point of view his visit to Crimea is inappropriate,’’ Fogh Rasmussen told reporters in Tallinn, Estonia.
Psaki called the trip ‘‘provocative and unnecessary.’’
Earlier, in Moscow, Putin watched as about 11,000 Russian troops marched across Red Square to the tunes of marches and patriotic songs. They were followed by dozens of tanks and rocket launchers as some 70 combat aircraft, including giant nuclear-capable strategic bombers, roared overhead.