A Moscow court has sentenced a protester to three years in prison for peaceful protests under a new law regulating unsanctioned protest activity introduced last year. Human rights activists believe the law is yet another means of repressing dissent in Russia.

Ildar Dadin, who took part in several single-person pickets in 2014, became the first Russian citizen jailed for participating in more than two unsanctioned public events in 180 consecutive days. Investigators claim he took part in four unsanctioned protests during 2014.

On December 7, the court found Dadin guilty of “repetitive violation of the regulations on public events,” and delivered the sentence the same day. Dadin has already spent 10 months under house arrest. He has also previously received administrative sentences for human rights-related activity, spending 7, 10 and 15 days in detention.

Speaking in court, Dadin pleaded not guilty and called the case against him a “shameful persecution based on an unconstitutional law.”

Я готов сесть за свои убеждения. Я боролся и буду бороться за свои права.

I am ready to go to jail for my beliefs. I have fought and will continue to fight for my rights.

A video from the courtroom shows the moment the verdict was read and the outcry immediately after.

Russian journalists, civil society, and political activists posted about Dadin's sentence on social media, with reactions ranging from shock to outrage.

In case you guys missed it, a Russian court went ahead and jailed a non-violent protester for three years. Three. Goddamn Years. — Natalia Antonova (@NataliaAntonova) December 7, 2015

Охренеть. Дадину дали три года реального срока за проведение нескольких одиночных пикетов — Alexey Navalny (@navalny) December 7, 2015

Holy crap. Dadin got three years—a real prison term—for holding several single-person pickets.

Первый срок за несанкционированный митинг, сразу 3 года дали Дадину. Дико жесткий приговор, просто максимально — Смирнов (@sssmirnov) December 7, 2015

First jail term for unsanctioned meetings, Dadin quickly gets three years. An extremely harsh sentence, the maximum.

Other users saw harsher sentences for peaceful protest as a logical development of Russian state cracking down on free expression and civic activism.

Одна беда в стране осталась – люди неправильно одиночные пикеты проводят. В тюрьму их. Гребаный стыд. https://t.co/UOW6avpSeG — Stepan (@AndrianovStepan) December 8, 2015

One problem left in this country—people incorrectly holding single-person pickets. Let's jail them. F*cking shame.

Human rights defender Pavel Chikov was almost resigned in his reaction and said suspended sentences for protesters were fast becoming a “positive outcome.”

Давно говорю, кто общественной деятельностью занимается сегодня в России, тому на три года колонии надо быть готовым. — Pavel Chikov (@pchikov) December 7, 2015

I've long said that those engaging in civic activity in Russia today should be prepared for three years in a penal colony.

Human rights organizations, including Memorial, Freedom House, and others, have also spoken out against the verdict. Amnesty International called the sentence a “shocking and cynical attack on freedom of expression.”

Dadin's fiancée Anastasia Zotova, in a blog post about his activism and his personal life, described him as a kind, caring person and denounced the sentence.

Он всегда требовал, чтобы полиция исполняла закон. Это человек, который искренне хочет сделать лучше страну, в которой он живет. А его любимая фраза — «честь и человечность превыше всего».

He always demanded that the police adhere to the law. This is a person who sincerely wants to make his country better. And his favorite phrase is “honor and humanity above all.”

Three other Russian activists, including Mark Galperin and 75-year-old Vladimir Ionov, have been charged with a similar crime for peaceful dissent and single-person picketing.

In a January 2015 interview with Open Russia, Dadin talked about becoming a civic activist and said his dream was to build a “lawful state” in Russia.

Всем, кто интересуется моим мнением, передайте: «Россия должна быть свободной. Я не уверен, что будет, но должна».