Several people were killed and injured when a bus hit a bus stop in central Stockholm on Friday.
There were six casualties in the incident, a spokesperson for Stockholm's rescue services said, without giving the numbers of those killed or those injured. The spokesperson said there were no passengers on the bus at the time.
"It is being investigated as involuntary manslaughter. The bus driver has been arrested but that is routine in such an incident," a police spokesperson said, adding they had no information pointing to it being an attack.
The incident occurred near the Royal Institute of Technology university.
Police said they would not comment on the number, gender or ages of those killed or injured.
"We do not yet know the cause of this, but right now my thoughts are foremost with those who have been affected and their families," said Prime Minister Ulf Kristersson in a post on X.
The US military said on Saturday it carried out multiple strikes in Syria targeting ISIS as part of an operation that Washington launched in December after an attack on American personnel.
Israeli fire killed at least three Palestinians in two separate incidents across Gaza, local health authorities said, as tension rises over continued violence.
Tens of thousands of people marched through Minneapolis on Saturday to decry the fatal shooting of a woman by a US immigration agent, part of more than 1,000 rallies planned nationwide over the weekend against the federal government's deportation drive.
At least one person has died in Australia's southeast where bushfires raging for days have razed buildings, cut power to thousands of homes and burned swathes of bushland, police said on Sunday.