Toddler, 2 adults shot and killed in Florida, authorities say

A 3-year-old child and two adults were shot dead on Saturday night after they visited a Florida apartment complex, officials said. 

It's believed they'd gone to an apartment on A.C. Skinner Parkway in Jacksonville along with two others to meet with some people about the private sale of a dog, Jacksonville Sheriff's Office Assistant Chief J.D. Stronko said during a press conference early Sunday morning. There were five people in the group: four adults and the toddler. 

A dispute of some kind started and gunfire broke out, officials said.