Extraordinary Lights over San Diego

This appeared over San Diego early in the morning of April 30. It was reported on local news and observed by a number of people. Is it a cluster of LED lights on balloons? A genuine unknown. Apparently it was only visible for a short time. The red, white and blue coloring of the lights suggests a prosaic origin, but, as one of the commenters on the video notes, UFO clusters are becoming more common. For the present, this is an unknown, and a dramatic one. Please note: the video of San Diego NBC Channel 7’s report on this sighting has been removed by the poster.