'Really the biggest thing I can impart to you today is we need help from the community to assist us in solving this crime... Somebody out there knows what happened.'

ST. LOUIS COUNTY, Mo. — An investigation is underway after five people were found dead in a home in north St. Louis County on Saturday afternoon.

Police said that six people were in a home on the 1900 block of Chambers Road on Friday night. One of them left and came back around noon on Saturday to find the other five people dead.

The St. Louis County Police Department confirmed this is a homicide and all five victims are adults.

On Sunday the victims were identified as 65-year-old Rondall Mullin, 54-year-old Derrick Penny, 54-year-old James L. Penny, 40-year-old Ronald Brewster Jr. and 37-year-old Rodney E. Holt.

On Monday, police said the victims were all shot to death and that drug activity was taking place inside the home.

The ShotSpotter service is installed in the area, but gunshots were not picked up in the area. Police Chief John Belmar said if the gunshots could be heard outside the house, ShotSpotter should have picked them up.

Lonetta Brewster told 5 On Your Sides one of the victims was her brother. She was on her way to a family reunion when she heard what happened.

"I hadn't told my mom. Nobody has said anything to my mom yet," she said. "I just pulled over and started crying because I don't know how I'm going to tell my mom."

She said he had three children and a grandchild. She said her focus is on her mom now.

"I'm going to try to stay strong. I'm going to try to stay strong for our mom. That's all I can do," she said.

"Really the biggest thing I can impart to you today is we need help from the community to assist us in solving this crime," said St. Louis County Police Chief Jon Belmar in a department live stream Saturday afternoon. "Somebody out there knows what happened."