Supposed aliens landed in Mexico’s Congress but there were no saucer-shaped UFOs hovering over the historic building or bright green invaders like those seen in Hollywood films.

The specter of little green men visited Mexico City as lawmakers heard testimony Tuesday from individuals suggesting the possibility that extraterrestrials might exist. The researchers hailed from Mexico, the United States, Japan and Brazil.

The session, unprecedented in the Mexican Congress, took place two months after a similar one before the U.S. Congress in which a former U.S. Air Force intelligence officer claimed his country has probably been aware of “non-human” activity since the 1930s.