The Jacksonville Sheriff’s Office confirmed a mass shooting and “multiple fatalities,” as well as “many” people transported away from the scene. Police said just before 3 p.m. that one suspect is dead, but officers were unsure if there’s a second possible shooter.
A Jacksonville hospital received multiple gun shot wound patients after 3 p.m. 
If "many" people were transported away from the scene, and that one suspect was dead just before 3 p.m. It is logical the many people were transported to a local hospital around that same time. 
( z1 receive :ARG0 ( z2 hospital :location ( z3 city :name ( z4 name :op "Jacksonville" ) ) ) :ARG1 ( z5 patient :ARG1-of ( z6 wound :ARG2 ( z7 shoot :instrument ( z8 gun ) :quant ( z9 multiple ) ) ) ) :time ( z10 after :op ( z11 date-entity :time "15:00" ) ) )