Mid-air in San Diego

Just witnessed a mid-air collision 5 miles south of KSEE :-(
I did not notice any aircraft in the sky until there was a medium sized
fireball low on the horizon. Two smoking pieces then split off and fell
down, reigniting into two smaller fireballs. About 3 minutes later the
smoke had vanished.
On TV the accident location was given as Griffen Park, El Cajon which
would put it WSW of KSEE or ESE of KMYF. It's close to the extended
localizer of KMYFs 28R and slightly north of San Diego's Bravo airspace.