The police responding to the attack encountered firing so intense that they struggled to tell how many gunmen were on the scene, an official said.

New footage has emerged before a gunman opened fire in a Swedish school which offers language courses for migrants.

A gunman who killed 11 people, including himself, at an adult education centre in central Sweden may have been a student at the school, police said on Thursday, as they described chaotic scenes after the country's deadliest mass shooting as being like an "inferno".

The authorities said that at least 11 people were killed and that the suspect was believed to be among the dead.

Swedish police said the gunman in the country’s worst mass shooting was connected to the adult education center where he opened fire Tuesday, killing 10 other people

Sweden is reeling from the country's deadliest mass shooting this week as investigators continue to look into the gunman's motive

The king and queen visited the scene of the tragic event that occurred on Tuesday and Swedish flags were flown at half-mast to honor the victims.

Three guns were found next to the man believed to have carried out a massacre on Tuesday that killed 11 people in Sweden, police told a press conference on Thursday.

Around 10 people were killed in a school shooting in Sweden on Tuesday, Swedish police said. (Reporting by Anna Ringstrom, Louise Rasmussen, Stine Jacobsen, Johan Ahlander, Simon Johnson and Niklas Pollard,

Police remained on the scene of an adult education center in Orebro, Sweden, where a deadly shooting left around 10 people dead on Tuesday, Feb. 4.