Video from Sunday night shows low-flying helicopters around the Ferry Building on the Embarcadero. Explosions also lit up the night sky.
RELATED: Helicopters, loud sound effects, perhaps celebrity sightings planned for 'Matrix' set in San Francisco
Pyrotechnics and special effects could be heard from far away, according to reports.
The movie has been filming in San Francisco for weeks. Multiple people have reported seeing Keanu Reeves at several locations throughout the city.
RELATED: Fans wait for hours for possible sighting of Keanu Reeves on 'Matrix' set in San Francisco
"The Matrix 4" is scheduled to be released in theaters on May 21, 2021.