AUSTIN (KXAN) — The Austin Police Department said it began a homicide investigation Sunday morning in southeast Austin.According to APD, an incident occurred in the 5700 block of Hammermill Run, which is near E Stassney Lane and S Pleasant Valley Road.An APD public information officer said that the time for a media briefing time is to be determined.This is a developing story. Check back with KXAN for more details.