Investigators are probing an event held by regional parliamentarians from the Alternative for Germany (AfD) party, at which xenophobic coloring books were allegedly handed out, German media reported on Tuesday.

The AfD event took place in Krefeld, 20 kilometers (12 miles) northwest of Dusseldorf, in the western state of North Rhine-Westphalia.

In response to a tweet, local police said: “We are aware of these children’s coloring books. We already have a complaint against the AfD parliamentary group for sedition.”

The booklet bore the name “North Rhine-Westphalia for coloring in,” and on one page shows people brandishing guns from within vehicles, many of whom are holding Turkish flags.

On another page, under the banner “We carry the can for this,” you can see caricatures of women in burqas and a hand with a knife emerging menacingly towards a swimming pool. It also shows stereotypical caricatures of people with bones in their hair and thick lips.

The AfD parliamentary group described the criticism as an “attack on the freedom of art and satire.” It spoke of an “art book with satirical sketches on the situation in the country” and said it was “inspired by a coloring book for adults.”