A man was hurt in a knife attack in Northern Ireland on Monday night, and this has caused tension in the UK.

The attack happened in north Belfast, and a man in his 40s is in the hospital with serious injuries. A politician called the attack 'medieval'.

The police are investigating and want to find out why the attack happened. They say it is a very serious assault.

The police chief said that people who helped at the scene probably saved a life.

The police do not think the attacker had help from others, and they do not think it was a terrorist attack. They found a kitchen knife, and the attacker lived near the scene.

The police will have more officers on the streets to keep people safe, and they want any protests to be peaceful.

Many people protested against immigrants in Belfast, and some set vehicles on fire.

People wore masks and gathered in different parts of the city. The police used armored vehicles, and a bus was set on fire.

The police gave more information about the 'brutal' knife attack in Belfast.

The British Prime Minister said the attack was 'sickening'.

He also said he does not tolerate violence on the streets.

Many politicians in Northern Ireland, including the First Minister, said they condemn the attack and want people to stay calm.

They said it is essential to find out the facts about what happened.

The politicians also asked people not to share violent videos or pictures on social media.

One politician said that sharing these videos does not help and can cause more problems.

Another politician had already shared a picture related to the incident.

The attacker, a 30-year-old man from Sudan, was charged with attempted murder and other crimes.

He will appear in court on Wednesday.

The police said the attacker had been allowed to stay in the UK after asking for asylum. He came to Belfast from Dublin by bus.

The police chief said the attacker was not known to the police and was not a security risk.

A charity that helps immigrants in Northern Ireland said they were 'horrified' by the attack.

The charity asked people to stay calm and not blame all immigrants for the attack.

They said most immigrants just want to live in peace and build a life for themselves and their families.

The attack happened before a speech by the British Opposition Leader, who talked about equalities laws and policing.

She asked the police to find out the facts about the attack as quickly as possible.

She also said that fear of being called racist might have stopped the police from acting in other cases.

The UK government responded to comments made by a US politician about a different incident.

The issue of race and policing has been in the news recently because of another incident.

A man was killed, and the police handcuffed him as he was dying, which was a mistake.

The killer was sentenced to life in prison, and there were protests after the incident.

The US Vice-President made comments about the incident, which were criticized by the British government.

He said the victim would still be alive if European leaders had stood up against immigration and self-hatred.

However, the victim was a dual citizen of England and Poland, and the Vice-President's comments were seen as insensitive.

The British government said the victim's family does not want his death to be used for political purposes.