The package that came to the Helsingborg police was brought by a man who said he'd received it from a stranger, reports Expressen. A police bomb squad picked up the package to send it to Stockholm for analysis, and everyone who came in contact with it had to stay at the police station.
Earlier today in Northern Sweden, a letting company in Gällivare and a postal sorting office in Umeå were evacuated, because of backages containing white powder.
About 50 people were examined too see if they had been exposed to any harmful substance.
The disruption to the postal service means around 10,000 northern households will not get their mail Monday, according to news agency TT.