Pranksters have been mass-calling President Trump's new immigrant crime hotline to report UFOs and alien sightings on its first day.

The controversial VOICE hotline launched on Wednesday and is an attempt from the new administration to tackle problems linked to immigration.

Secretary of Homeland Security John Kelly said: “Until today, those victimised at the hands of illegal aliens have had no point of contact in our federal government dedicated to this issue and to them. Families would call and would send letters all over Washington hoping that someone in some agency would respond.”