Three killed, nine injured following mass shooting in Los Angeles.

Three people have been killed following a mass shooting at a Halloween party in Los Angeles. Emergency services were called to a residence at 10.44pm local time in Long Beach, LA.
The Long Beach Fire Department confirmed the deaths of three adult men. Nine more people were injured in the shooting."At 10:44 pm, LB firefighters responded to shooting at a residence on the 2700 block of 7th Street," they said on Twitter."An MCI was declared with a total of 12 patients. Three confirmed fatalities (adult males), nine patients transported to local area hospitals."The LA Times reports that witnesses said there was a Halloween party happening in the residence when the shots were fired.