In a network there was video from the scene of the murder of journalist Pavel Sheremet https://t.co/G298GY2Qzm pic.twitter.com/End7soblKS — Rus to En Fr Es News (@Rus_Eng_News) July 20, 2016

A prominent Ukrainian journalist, Pavel Sheremet, died when his car exploded in Kiev on July 20 in front of a fast-food restaurant, said The Kyiv Post. He was known as an “outspoken critic” of Russian President Vladimir Putin, and a prosecutor has confirmed he died from an explosive device that was planted in the car.

Imprisoned previously for his reporting, he’s called a “crusader of human rights, free speech, and press freedom.”

.@pavelsheremet was crusader for human rights, free speech, press freedom. Belarus jailed him, couldn't silence him. He won CPJ, OSCE awards — Christopher Miller (@ChristopherJM) July 20, 2016

Pavel Sheremet outspoken Putin critic got murdered in a 'car accident' in Kiev. no accident. pic.twitter.com/LFlPTH5Ier — London Analyst (@LondonAnalyst) July 20, 2016

Sheremet was a prominent reporter for Ukrainska Pravda, an online news outlet, The Kyiv Post said. The Post said that Sheremet was killed as he drove his car at 7:45 a.m. on his way to record a radio program he hosted called Radio Vesti.

The Associated Press’ Moscow correspondent wrote on Twitter: “Sheremet was unique because his reporting has irked officials on the ex-Soviet Union’s big three: Russia, Belarus, Ukraine.” RT said Sheremet was “a well-known Russian journalist and political analyst specializing in relations between Russia and Ukraine, as well as developments in former Soviet republics.” He lived in Urkaine, and died in Kiev. A prosecutor has confirmed it was murder.

The car blew up only a few minutes after he’d turned it on, according to the news service RT. RT said the car belonged to his boss at the Ukrainska Pravda, Alyona Pritula. The car blew up in front of a McDonalds, said Ukrayinska Pravda. Pritula was not in the car; both she and Sheremet had complained about being watched, said The Moscow Times.

According to The Interpreter, Anton Gerashchenko, a member of parliament, posted on his Facebook page in Russian that Pavel Sheremet likely died from a remote-controlled explosive device placed under the car. According to The Interpreter, Gerashchenko called it a “cynical and well-planned murder” and said, “The investigation will review all possible hypotheses of the murder of Pavel Sheremet. Above all, those connected with his journalist activity. The Russian trail is not excluded.”

@ChristopherJM @pavelsheremet Could have been targeting his boss Alyona Pritula, it was her car? — Martin Walsh (@martinwalsh) July 20, 2016

Photos and videos of the exploded car were widely circulated on Twitter and Facebook:

В Киеве подорвали автомобиль с российским журналистом Павлом Шереметом #киев https://t.co/n0XMXwQ2tP pic.twitter.com/txzOLdLW6f — Газета Кемерова (@gazeta42) July 20, 2016

In Kiev killed the journalist Pavel Sheremet – stream from the place of death https://t.co/BeF0K7qlCO #news #Russia — Rus to En Fr Es News (@Rus_Eng_News) July 20, 2016

https://twitter.com/Bykvu/status/755640698758635521/photo/1?ref_src=twsrc%5Etfw

As media converges on the scene of @pavelsheremet SBU and other investigators comb the vehicle |EMPR pic.twitter.com/1eOkXOTNci — Euromaidan PR (@EuromaidanPR) July 20, 2016

#Pavel Sheremet, one of the best journalists in Ukraine was killed pic.twitter.com/o3fbwMnlyx — KETEVAN KARDAVA (@KARDAVAKETEVAN) July 20, 2016

Atentat la Kiev. Jurnalistul Pavel Sheremet a fost asasinat în centrul orașului. https://t.co/4sSzyxKkGC pic.twitter.com/RW9ZTqZhYD — andrei marian mihai (@andreimarianmih) July 20, 2016

Disgust and shock in Ukraine, following the death of prominent journalist Pavel Sheremet in a car bomb in Kiev. https://t.co/Pc3o7OIcTD — Laura Byrne (@LauraByrneStory) July 20, 2016

Prominent Belarusian journalist Pavel Sheremet has been killed. His car exploded in Kyiv https://t.co/uhxZpsiJsX pic.twitter.com/ncYWodim2s — RFE/RL (@RFERL) July 20, 2016

Watch a video from the scene here.

Reaction was swift on Twitter:

Apparent assassination of @pavelsheremet is terrifying. Harkens back to dark times under Kuchma & Yanukovych. Probe will be test for Kiev. — Christopher Miller (@ChristopherJM) July 20, 2016

Pavel Sheremet was Belarusian living in Ukraine, always kind & tolerant. Why?! As partly Belarusian I'm devastated.. pic.twitter.com/93DP4bsCZO — praevisio (@praevisio) July 20, 2016

On Pavel Sheremet's murder: No words and hard to believe. Horrific tragedy and attack on all journalists in Ukraine. https://t.co/x0yJm4kMfs — Paula Chertok (@PaulaChertok) July 20, 2016

The Interpreter describes Sheremet as a “veteran journalist known throughout the former Soviet Union for his critical reporting” and noted that Ukraine has elections this week. According to The Interpreter, Sheremet, born in Belarus, was sent to prison for critical reporting by the Belarusian leader. He was also arrested in 1997 “while covering a story on smuggling at the Belarusian-Lithuanian border. After an international outcry, he was released from prison.” He ended up fleeing to Ukraine and is a past recipient of the U.S. Based International Press Freedom Award, said the news site.