Updated since first published.

Aargau, Switzerland – Police in canton Aargau say a 36-year-old man shot his parents-in-law, his brother-in-law and seemingly, a passerby before killing himself.

According to authorities, the man, identified as a Swiss national residing in canton Schwytz, killed his in-laws ages 58, 57 and 32, at their home.

Later, after leaving the house, the suspect shot and killed a 46-year-old man. It is unknown for the time being if he knew his fourth victim, or if he was just a passerby. The suspect then killed himself on the street.

The incident occurred at around 23:00 last night Saturday 9 May.

The man, who had a police record, was separated from his wife with whom he had three children.

Police say the suspect did not have a gun permit and did not use his own army-issued weapon to commit the crime.

Due to privacy laws in Switzerland the identities of those killed will not be revealed.

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