Hundreds of Polish judges dressed in formal black robes marched in Warsaw on Saturday to protest a draft law aimed at punishing justices who question the government's controversial court reforms.

Senior judges from nearly all European Union member states joined the protest, arguing that the legislation backed by Poland's right-wing government undermines judicial independence and the rule of law.

"We have come here to support the Polish judges but we are not politicians," John MacMenamin, an Irish Supreme Court judge, told reporters.

"We are here about the rule of law, not about politics," he added.

Judges from most of the EU member states joined hundreds of their Polish colleagues for the protest in Warsaw
Judges from most of the EU member states joined hundreds of their Polish colleagues for the protest in Warsaw AFP / JANEK SKARZYNSKI

While the government insists the reform will tackle corruption, the opposition says the ruling Law and Justice party (PiS) wants to gag critical magistrates.

Polish lawmakers approved proposals last month that will allow sanctions against judges who opposed the reforms, which Supreme Court president Malgorzata Gersdorf has denounced as a "muzzle-law".

Thousands of Warsaw residents joined the protest, many waving Polish and EU flags, as they marched from the Supreme Court to parliament.

In a letter made public on Friday, the Council of Europe's human rights commissioner Dunja Mijatovic called on the Senate, where the opposition holds a narrow majority, to reject the bill.

IMAGESThousands of citizens and hundreds of judges and prosecutors from all over Europe rally in Warsaw against a controversial law which could punish judges who question the government's controversial court reforms, a legislative move that critics argue
IMAGESThousands of citizens and hundreds of judges and prosecutors from all over Europe rally in Warsaw against a controversial law which could punish judges who question the government's controversial court reforms, a legislative move that critics argue undermines judicial independence. The lower house of parliament adopted the legislation proposed by the governing right-wing Law and Justice (PiS) party last month. AFPTV / Damien SIMONART

Mijatovic expressed concern that it was "designed to further silence dissent among critical judges and prosecutors and curtail their independence".

However, the PiS-dominated lower house could still overturn its decision and force it into law.

Since taking office in 2015, the PiS has introduced a slew of controversial judicial reforms that it insists are designed to tackle corruption.

But critics, including top European judicial bodies, argue they undermine the rule of law, so threatening Poland's democracy.

In late 2017, the EU launched unprecedented proceedings against Poland over "systemic threats" posed by the reforms to the rule of law that could see its EU voting rights suspended.

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