More from RFE/RL's news desk on the deadly car blast in Mariupol:
Top Regional Security Officer Killed In Ukraine's Troubled Region Of Donetsk
Ukraine says one of its top regional security officers has been killed in a car explosion in the southeastern Ukrainian city of Mariupol.
The Ukrainian Security Service (SBU) cited its chief Vasyl Hrytsak as saying that Colonel Oleksandr Kharaberyush was killed in the car blast in the port city on the morning of March 31.
"The SBU will do all it can to locate and punish those involved," Hrytsak said.
Donetsk regional police chief Vyacheslav Abroskyn wrote on Facebook that an investigation has been launched into the car blast.
He wrote that investigators do not exclude that it was conducted by pro-Russian separatists who are controlling parts of Donetsk and Luhansk regions.
ICYMI:
Good morning. We'll get the live blog rolling today with this item that our news desk filed overnight:
Tillerson To Push NATO Allies On Military Spending, Press Russia On Ukraine
U.S. Secretary of State Rex Tillerson has arrived in Brussels to attend a March 31 NATO meeting that was rescheduled to allow him to attend.
A senior State Department official told reporters that Tillerson will push alliance members to increase their defense spending and will work with allies to press Russia to abide by the Minsk agreement to end the crisis in Ukraine.
The gathering is preparation for a May 25 NATO summit, which President Donald Trump has said he will attend.
Since his presidential campaign, Trump has pushed to get U.S. allies to increase their defense outlays to help ease the burden on Washington.
Trump's criticism of NATO -- calling it "obsolete" at one point -- and his long-stated desires to have closer relations with Russia have concerned many NATO allies.
NATO chief Jens Stoltenberg dismissed concerns that Trump is not as committed as his predecessors to the Western military alliance.
"They are very committed to NATO and the transatlantic bond because they see the importance of NATO for Europe, but they also see the importance of NATO for the U.S.," Stoltenberg reporters on March 30.
Some leaders are also concerned about Trump's commitment to end Russian interference in Ukraine.
Western nations have imposed sanctions against Moscow for its illegal annexation of Ukraine's Crimea region and for Russia's support of separatist fighters in eastern Ukraine.
The U.S. official said Tillerson will discuss ways of getting Russia to comply with the Minsk agreement, which set out steps to end the war between Kyiv and the separatists and restore Ukraine's control over its border with Russia.
Trump will also urge the allies to increase their role in fighting terrorism, the official said.
Tillerson initially planned to skip the NATO meeting, citing various commitments including a trip to Russia, forcing the allies to reschedule the event.
With reporting by AFP and The Los Angeles Times
We are now closing the live blog for today, but we'll be back again tomorrow morning to follow all the latest developments. Until then, you can keep up with all our other Ukraine coverage here.