Our Ukrainian Service reports on the unrest in the eastern town of Kostyantynivka after a girl was killed by an armored vehicle:

Authorities in a government-held town in eastern Ukraine have made arrests after violence that followed a road accident in which an armored vehicle struck and killed a young girl.

Angry residents of the Donetsk region town of Kostyantynivka threw stones at a barracks, torched two cars, and overturned a third after servicemen apparently lost control of an armored vehicle on March 16, killing a girl who was about 7 years old and injuring her aunt and a toddler.

Police stepped up patrols to avert any more unrest, Donetsk region police chief Vyacheslav Abroskin said on Facebook on March 17.

Abroskin said two servicemen responsible for the accident had been detained, and that organizers of the "disorder" had been identified.

Anton Herashchenko, an adviser to Ukraine's interior minister, told RFE/RL that "we respect the protest by the citizens after the tragedy, but we will do everything to prevent the Russian secret services and their supporters from further destabilizing the situation."

Kostyantynivka lies north of the regional capital, Donetsk, which is held by Russian-backed rebels whose conflict with government forces has killed more than 6,000 people since April. (with UNIAN, RIA Novosti)

Savchenko resumes hunger strike in Russian jail:

Ukrainian military pilot Nadia Savchenko says she has resumed her hunger strike in a Russian jail and is prepared to die if she is not released.

Savchenko announced the decision in a letter from pretrial detention at Moscow's Matrosskaya Tishina jail.

"As of March 16, I am resuming the hunger strike until I am returned to Ukraine or until the last day of my life in Russia," she wrote in the letter posted on Twitter by one of her lawyers, Mark Feigin.

"I have no intention of changing my decision," she wrote in a separate letter addressed to her lawyers.

Savchenko, 33, lost about 20 kilograms after being drip-fed on glucose and vitamins alone during a hunger strike she began on December 13.

She stopped the hunger strike on March 5, citing health concerns.

Savchenko is charged with involvement in a mortar attack that killed two Russian journalists covering the conflict between government forces and Russian-backed separatists in eastern Ukraine.

She says she was kidnapped by separatists in June and illegally brought to Russia, which she says has no right to try her. (with AFP, Interfax)

In May 2014, cities in eastern Ukraine that held referendums on independence included Mariupol:

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Here is today's map of the security situation in eastern Ukraine, according to the National Security and Defense Council: