The suspect, a 27-year-old Eritrean asylum seeker, was arrested at a nearby refugee shelter, where the knife used in the attack was also found.
The 18-year-old student has been arrested at the scene in Malmo, Sweden’s third-largest city.
Police have arrested a man after the attack on a high-speed train left at least three people injured.
Authorities identified the last week's knife attacker as Ahamed Aathil Mohamed Samsudeen, a Sri Lankan national, who arrived in New Zealand 10 years ago at the age of 22 on a student visa.
The suspect has been arrested. The motive for the attack remains unknown.
The assailant was shot by police and later died of his injuries.
A suspect was arrested after a knife attack took place near the former office of satirical magazine Charlie Hebdo, a police source said.
Police in Scotland identified the suspect who was shot dead by officers during a knife attack in the city of Glasgow as Badreddin Abadlla Adam, 28, from Sudan.
The attack happened at about 10:00 pm on Saturday, the seventh night of Hanukkah, with about 100 people gathered for a candle-lighting ceremony. Suspect Grafton Thomas denied the charges of five counts of attempted murder
The attack was carried out in Villeurbanne, a Lyon suburb, in southeastern France.
A male suspect was brought "under control" and the wounded students were taken to hospital, three of them seriously injured. The attack was in the Xicheng district of the capital, Beijing. The assailant was arrested and is being questioned.
Jair Bolsonaro, a far-right candidate in Brazil's presidential election, was stabbed during a rally last week in the city of Juiz de Fora. He is currently recovering from the attack and has seen a spike in his polling numbers since the assault.
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