The Colorado Muslim Community Center has begun filling in its pool in order to build a basketball court over it, and the work in progress has some neighbors upset.

It’s not that they prefer swimming to playing basketball. Some Aurora residents think that the work suggests the community center near Hampden Avenue and Chambers Road is turning into a mosque, CBS Denver reports. And, apparently, that mosques are inherently bad.

As one woman (who did not give her name) put it: “I don’t know those people. And it does raise fears when people are dishonest about their motives.”

The city of Aurora has issued a statement saying the construction is in fact to build a basketball court, and CBS reports that the community center has already held an open house attended by residents.

The city is planning a meeting to discuss neighbors’ concerns.

We’ve contacted the Colorado Muslim Community Center and will update this post when we hear from them.