Listen to the municipal council in the clip above.

Wednesday's section of Assignment review reveals that the construction company Peab provided the Social Democrats in Sigtuna municipality, where Anders Sandén previously sat as the highest politician, with polling booths and election posters in several elections.

At the same time, Peab received most of the construction projects in the municipality.

In the spring of 2002-2013, he was chairman of the municipal board in Sigtuna for the Social Democrats.

During that period, Peab received many assignments from the municipality.

The revelation has provoked reactions.

"Must have the whole"

- This is hard for Åmål municipality and also for Anders.

It is clear that we take this seriously, but you have to have the whole in it to be able to move forward in it, says Michael Karlsson and refers to the second part of Assignment review which will be broadcast next week.

Does this have any consequences?

- I have to have the whole thing then I need to meet my party, my majority group, I want discussions with the entire municipal board where we together see what the consequences will be in the short and long term.

But I also want to sit in conversation with Anders after program two, he says.

Anders Sandén denies having made any mistakes, and says that neither he nor the party was in any way sponsored by Peab.

- I have no reason to believe that we have not done the right thing for us, he has previously told SVT.