Los Angeles County Sheriff's homicide detectives said Monrovia police received a call from the home in the 200 block of North Mayflower Avenue concerning a disturbance. While officers were en route, another call came in of shots fired.
"We were up watching the news this morning about quarter to five when we heard five gunshots. Three gunshots, then a hesitation, and then two more," said neighbor Gary Gieghorn.
When officers arrived at the home at 5:18 a.m. they found a man thought to be about 65 years old with a gunshot wound. The man was pronounced dead at the scene.
Police said a couple and their two young children live in the home. The man had been staying at the home for the last couple weeks, but his relationship to the family was unknown.
Gieghorn said the family moved into the home a few months ago and seemed "really nice."
No arrests have been made in the case. Investigators were processing the scene and speaking with the family members.
Since the Monrovia Police Department does not have a homicide bureau, the investigation was turned over to the Los Angeles County Sheriff's Homicide Bureau.