SLOVYANSK, Ukraine – Ukraine launched an offensive against separatist forces for control of a besieged eastern city Friday, while clashes between pro- and anti-government activists in the previously calm southern port of Odessa led to a fire that police said killed 31 people.
The first serious offensive by the government in Kiev and the dozens of deaths in Odessa sharply escalated the crisis that has led to the worst tensions between Russia and the West since the Cold War. The Kremlin said the battle for the separatist-held city of Slovyansk effectively destroyed the Geneva pact aimed at cooling the unrest in the deeply divided country.
Oleksandr Turchynov, Ukraine’s acting president, said many insurgents were killed or wounded in the eastern offensive that also underlined the military’s vulnerability. The military action came two days after Kiev said it had lost control of eastern Ukraine.
Both sides said two Ukrainian helicopters were shot down by the insurgents near Slovyansk, killing two crew members, while authorities said another seven people also died: three separatist gunmen, two soldiers and two civilians.
By nightfall, Ukrainian troops and armored personnel carriers blocked all major roads into Slovyansk, and the central part of the city remained in the hands of pro-Russia gunmen, according to Associated Press journalists inside. Most shops were closed, and the few that were open were crowded with customers stocking up on supplies.
Sporadic gunfire was heard in Slovyansk’s downtown late Friday, while Russian news reports said there were armed clashes in the nearby town of Kramatorsk. There was no immediate independent confirmation of fighting.
The Ukrainian Security Service said one helicopter was downed with a surface-to-air missile, adding that the sophisticated weapon undercut Russia’s claims the city of 125,000 people was simply under the control of armed locals.
“Ukrainian security forces so far are not ready for large-scale military actions; moreover, such actions could provoke Russia’s invasion,” Kiev-based political analyst Volodymyr Fesenko said.
Unlike eastern Ukraine, Odessa had been largely tranquil since the February toppling of President Viktor Yanukovych, who fled to Russia. But clashes erupted Friday between pro-Russians and government supporters in the key port on the Black Sea coast, located 330 miles from the turmoil in the east.
Police said the deadly fire broke out in a trade union building, but did not give details on how it started. Earlier, police said at least three people had died in a clash between the two sides in the city of 1 million.
According to Ukrainian news reports, the pro-Kiev demonstrators broke up an encampment of Moscow supporters outside the trade union building. The latter took refuge in the building, which then caught fire.
Odessa police spokesman Volodymyr Shasbliyenko said the fire apparently was caused by Molotov cocktails. He had no further details or identities of the victims.
Russia’s Foreign Ministry said the fatal fire was “yet another manifestation of the criminal irresponsibility of the Kiev authorities who indulge insolent radical nationalists … which are engaging in a campaign of physical terror” against those in Ukraine who want more autonomy for the pro-Moscow regions.
In Washington, German Chancellor Angela Merkel and President Barack Obama warned that Russia could be hit by new sanctions from the U.S. and the European Union if it continues disruptive actions in Ukraine. Previous sanctions are showing signs of significant effect on the Russian economy.
The fighting in Slovyansk, a city about 100 miles from the Russian border, broke out around dawn. Stella Khorosheva, a spokeswoman for the insurgents, said three fighters and two civilians were killed in the clashes.
Slovyansk is strategically key because Ukraine has a huge stockpile of automatic rifles and other light weapons near the city, according to a commentary Friday for Britain’s Royal United Services Institute defense think tank.
Turchynov said some government troops and police in eastern Ukraine were “either helping or cooperating with terrorist organizations.” He said Ukrainian forces were working to prevent the unrest from spreading to other areas.
At Russia’s request, the U.N. Security Council met in an emergency session Friday on Ukraine.