“Providing accommodation to foreign nationals without police intimation poses a serious security risk. Officials pointed out that several foreign nationals continue to stay in the city even after their visa period has expired. In some cases, individuals who entered India on student visas were found to be involved in illegal activities, including drug trafficking. The police believe that mandatory submission of Form-16 will help maintain a comprehensive database of foreign nationals residing in Bengaluru. The warning comes in the backdrop of multiple high-profile drug busts in Bengaluru, including cases involving African nationals.