Police attend the scene following a stabbing attack in North Belfast on 9 June in Belfast, Northern Ireland. A knifeman has been arrested after a man was taken to hospital with serious injuries following a stabbing in north Belfast leaving the local community fearful.

• A Sudanese man was arrested over a knife attack in north Belfast that left one person in serious condition.
• The incident sparked online calls for protests amid heightened tensions in Britain over immigration and violence.
• Political leaders condemned the attack and urged calm whilst police investigate the motive as a critical incident.

Police in Northern Ireland said they had arrested a Sudanese man on Tuesday over a knife attack that left one person in a serious condition and prompted ‌calls online for a protest after footage circulated on social media.

Prime Minister Keir Starmer described the incident as “sickening” after video of the attack, which took place in north Belfast late ‌on Monday evening, was shared widely online.

Police said the suspect was a 30-year-old Sudanese national, correcting an earlier statement that he was believed to be Somali, and cautioned that inaccurate information was circulating online about the victim’s condition.

The injured man, in his 40s, remained ‌in a serious ⁠condition in hospital, the police said.

It comes at a time of heightened tensions in Britain after the murder of a student who was handcuffed by police as he lay dying from stab wounds after his killer, a Sikh man, falsely alleged a racist attack.

In a debate in the British parliament in London, some lawmakers called for more transparency about the Belfast suspect’s background, saying a lack of confirmed information risked fuelling speculation online and stoking tensions over immigration.

Northern Ireland’s main political party leaders jointly condemned the attack in ⁠a statement, calling it “horrific” and urging calm while backing the police investigation.

The deputy first minister, Emma Little-Pengelly, had described it as a “savage and barbaric attack”.

A widely shared post on Facebook and WhatsApp called for protests on Tuesday evening.

“This is ⁠a deeply concerning assault, and I have declared this a critical incident,” Assistant Chief Constable Ryan Henderson said. “We have commenced an investigation to establish a motive.”

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“We are also aware of footage circulating online, and we would strongly urge members of ⁠the public not to share or repost these images. Doing so risks causing further ‌trauma to the injured ‌man’s loved ones and may impact the ongoing investigation.”