* Pepper spray injures protesters, police officers
* President Radev renews calls for government to resign
* Prime Minister Borissov pushes with plan for new constitution

Thousands of Bulgarians rallied in front of the parliament in Sofia on Wednesday in one of the biggest protests so far in two months of demonstrations calling for the resignation of Prime Minister Boyko Borissov.

Scuffles broke out between protesters and police, who fired pepper spray and arrested 35 people. Protesters threw eggs, apples and garbage against the heavily guarded parliament.

They also shook police vehicles, and about 100 officers were affected by pepper spray aimed at them by protesters, Sofia Police Chief Georgi Hadzhiev said. Health officials said some 45 people including police officers, were treated in hospitals.

The rally took place on the first sitting of parliament after summer recess. Protesters called it the ‘Grand National Uprising’ in response the government's plan for a new constitution.

Protesters accuse three-times premier Borissov and Chief Prosecutor Ivan Geshev of failing to fight the corruption that erodes the rule of law and benefits powerful tycoons in the European Union's poorest country.

In parliament, President Rumen Radev called for the resignation of Borissov's centre-right government and appealed to deputies to dismiss the plans for a new constitution.

‘It was not the lack of new constitution that brought the people on the streets, but the lack of morality in the leadership, the erosion of statehood and the corruption,’ he said.

Borissov has pledged to resign if parliament approves his call for the election of a grand national assembly tasked with voting on a new constitution that should improve the independence of the judiciary and halve number of deputies.

Protesters, as well as opposition parties, have dismissed the proposal as a ploy aimed at keeping Borissov, 61, in office longer as the vote on whether Bulgaria should have a new constitution may take place in November at the earliest.

On Wednesday, the ruling coalition, undaunted by the protests, said it was starting debates for a new main law in the parliament, although for the time being it does not have enough votes to push ahead with the plan.

Bulgaria, which joined the EU in 2007, ranks as its most corrupt member according to Transparency International, and is yet to jail a senior official on corruption charges.

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