LUHANSK, Ukraine (AP) — Hundreds of pro-Russia rebels armed with automatic weapons and rocket-propelled grenades mounted a daylong assault Monday on a key government base used to coordinate the defense of the country's border with Russia, prompting the deployment of air support by government forces.
Border guards killed at least five rebels in repelling the attack on their base, a spokesman for the border guard service said.
In the center of Luhansk, some six miles (10 kilometers) away, a blast at an administrative building held by the insurgents claimed more lives. A health official for the Luhansk region told Interfax news agency that at least seven people had been confirmed dead in what rebels described as a government airstrike.
The government denied carrying out an airstrike and said the blast was caused by misdirected rebel fire from a portable surface-to-air missile launcher.
Russia's Foreign Ministry swiftly condemned what it said was a government attack on the rebel-held building and urged U.S. Assistant Secretary of Defense Derek Chollet, who was visiting Kiev on Monday, to help calm unrest in Ukraine.
"We urge our Western partners to use their influence on Kiev, to stop Ukraine from descending into a national catastrophe," the ministry said in a statement.
Russia also called an emergency meeting of the U.N. Security Council to introduce a resolution calling for an immediate halt to the violence and talks to establish a cease-fire. Moscow has almost daily demanded that the Kiev government halt its military operations in the east, but it was the first time it has called for a Security Council resolution. It was unclear how much support the proposal would have.
The rebel assault on the government base continued into the night, ending around 9 p.m. with the border guards succeeded in repelling the insurgents.
Earlier, rebels in camouflage had promised safe passage to the government troops if they surrendered and laid down their arms. The pro-Russian insurgents, who have seized government and police buildings across eastern Ukraine, have waged increasingly aggressive attacks on government-held checkpoints and garrisons in an attempt to seize weapons and ammunition from Ukrainian forces.
The attacks are deeply troubling for Ukraine's new government, whose president-elect, Petro Poroshenko, has pledged to crush the separatist movement in the east. The conflict has escalated markedly in the past week, with rebels attempting to seize a major airport and the shooting-down of a Ukrainian military helicopter.
Serhiy Astakhov, the spokesman for the border guard service, told The Associated Press that five rebels were killed and eight wounded in Monday's attack on the walled compound on the western fringes of Luhansk, a major city not far from the Russian border. He said seven servicemen were wounded, three seriously.
The initial attack by about 100 insurgents was met by gunfire from the border guards, and the number of attackers swelled to around 400 a few hours later, he said. Astakhov said the Ukrainian armed forces sent aircraft to the area, and at least one fighter jet was seen flying overhead.
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