Violence there flared again on Sunday, with police reporting more sectarian fighting on the streets and clashes between police and youths.
There is widespread anger in Bangladesh over the disaster and fresh clashes between police and protesters erupted again on Saturday.
He was speaking after three police officers died when their helicopter was shot at and brought down in Rio de Janeiro during clashes involving police and drug gangs.
There will be some trepidation too over whether the summit will be disfigured, as were the EU summit in Gothenburg last year and the G8 summit in Genoa, by clashes between the police and anti-globalisation demonstrators.
There were brutal clashes between pickets and police but the strike eventually collapsed the following March.
Mr Cormack was speaking at the weekend, after days of clashes between police and protesters.
On Wednesday, the security chief in Port Said was dismissed following renewed clashes between demonstrators and police.
About 80 families were evicted from Dale Farm amid violent clashes between police and protesters last October.
The curfew was imposed after another man was killed later in the day in clashes between police and protesters.
There were more clashes between fans and police towards the latter stages of the tie as supporters tried to invade the pitch.
The IPCC said a total of 145 complaints had been made following clashes between police and protesters at the G20 summit in London.
At least four people have died in Bangladesh in clashes between police and Islamist protesters who took to the streets accusing bloggers of blasphemy.
At the March 2011 demonstration, there were clashes between police and protesters in Trafalgar Square - hours after a peaceful march to Hyde Park.
Owners were forced to temporarily close 300 private garment factories in the Ashulia industrial belt outside Dhaka in June last year after clashes between workers and police.
After word spread that the defendants were being moved outside Port Said, the city saw six days of clashes between police and protesters around the security headquarters.
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Around 400 residents of Aracinovo had left Macedonia on Thursday, fearing clashes between rebels and police, according to a Reuters reporter at the border with Albanian-dominated Kosovo.
Small groups of demonstrators took to the streets in Madrid, Barcelona and Seville calling on him to step down, and clashes with police took place in the capital at the weekend.
Minor clashes between police and protesters followed the vigil.
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At least six people have been killed and 35 wounded in clashes in northern Burundi between police and a Catholic sect, an official has said.
There were clashes between protesters and the police on the Osmania University campus, which has become the centre of the Telangana movement.
The incident came hours after another deadly shooting, this time at the Amplats mine, in which a man died during clashes between striking miners and police.
There have been several riots and clashes with Jordanian police.
This was a 17-mile route, and there were clashes with police all along the way.
Authorities in Tunisia say an Islamist militant has been killed in clashes between radical Salafi Muslims and police in the capital Tunis.
The clashes happened while Iraqi police and army were raiding three neighborhoods in the city searching for wanted militants, the official said.
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The decision to postpone Marseille's match with Paris St Germain's on Sunday left thousands of supporters on the streets and led to clashes with police.
It follows clashes on Wednesday between police and a number of refugees protesting against poor living conditions, at a camp near the Akcakale in Turkey, near the Syrian border.
In the latest clashes, gunmen and Iraqi federal police faced off Thursday night in the city of Falluja, a predominantly Sunni city in Iraq's Anbar province, Iraqi police told CNN.
Police were quoted as saying between 10 and 30 protesters were injured in clashes with police, along with 10 police officers.
The strike follows clashes between pro-Telangana activists and police in the state capital Hyderabad on Sunday.
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