ICEBlock, a new app that encourages users to share information about sightings of Immigration and Customs Enforcement agents nearby, has risen top of the Apple App Store, amid criticism from Trump administration officials who say the app could put agents at risk.

ICEBlock”, an app that allows users to report sightings of ICE activity, has hit the top of the App Store charts for downloads. The app’s developer, Joshua Aaron, defends his reasons for making the mobile application and explains why the Trump administration isn’t happy with its rising popularity.