LONDON (AP) — A poster campaign by the anti-immigrant Sweden Democrats at a subway station in central Stockholm has stirred outrage in the Nordic country.

The posters plastered above the escalators at Ostermalmstorg subway station are directed to tourists visiting the Swedish capital and apologize for “the mess” in Sweden, saying the country has a problem with “forced begging” organized by “international gangs.”

Critics say the message spreads racist misconceptions about Roma people from eastern Europe who are begging in Sweden. Anger has also been directed at Stockholm’s public transport provider SL, which is owned by the city council and is profiting from the ads.

More than 13,000 people signed up to join a demonstration in downtown Stockholm later Tuesday against “SL’s spread of racism and the normalization of racism in Sweden.”

Protesters also used social media to express their dismay at the ad campaign, posting counter messages like: “Sorry about the mess here in Sweden. We have neo-fascists in the parliament.”

SL spokesman Jesper Pettersson said Tuesday its policy allows advertising by all political parties as long as it is not illegal. He said SL officials had reviewed the ads and concluded that they were legal.

However, the office of Sweden’s Chancellor of Justice said it has received more than 50 complaints and will investigate whether the publishers are inciting racial hatred.

Sweden’s left-leaning government in June put forward a proposal to increase its cooperation with Romania and Bulgaria to help people who travel from those countries to Sweden to beg. The opposition Sweden Democrats, the third-biggest party in Sweden’s parliament, say that is not enough and have called for visas for people traveling from the two EU countries to Sweden.