Slattavik told local news organisations that it was a little practical joke and he wanted to see how people would react.
"I laid out the photo to see what happened," he said, adding that he was shocked so many people fell for it.
Sindre Beyer, a former politician, noticed the mistake and shared the post on his account.
It now has around 2000 shares and social media users are not holding back on their
criticism of the group's prejudice. Users have posted comments such as, "New ad for Specsavers?" and, "the meanest are always the stupidest.".
Hva skjer når det legges ut et bilde av noen tomme busseter på en brungrumsete gruppe på Facebook og nesten alle tror de ser en gjeng med burka ?😳
Posted by Sindre Beyer on Friday, 28 July 2017
With an ongoing debate about extremism and freedom raging in Europe, Norway was the first Scandinavian country to propose a ban on full-face veils in schools and universities last year.
The high influx of Muslim immigrants into Europe over the last few years is believed to have fuelled scepticism and prejudice throughout the continent. France, Belgium, Bulgaria, the Netherlands and Switzerland all have laws and restrictions on the burqa or niqab.
Norway's Integration and Diversity Directorate has posted a summary surrounding the country's attitudes towards immigration and diversity. The report contains a section on attitudes to people with different religious beliefs which concluded, "A clear majority are sceptical of Muslims."
According to the summary, the proportion that is sceptical of Muslims is a high in the whole population, regardless of religiosity.