CHARLOTTE, N.C. -- Charlotte-Mecklenburg Police were investigating a double homicide and suicide Saturday night. They said the victims were two children, and their mom jumped off a bridge.

It happened in the 2100 block of Sebastiani Drive in northwest Charlotte.

Police forced their way into the home where they found a seven-year-old boy and a three-year-old girl. The two kids who were badly assaulted were taken to the hospital where they later died.

Detectives believed their mother assaulted them before jumping to her death off Old Gum Branch Road bridge onto I-485.

Police are trying to figure out why.

"That's at the core of this investigation. What would cause somebody to obviously be so despondent to take their own life and then take the lives of their children," an investigator with CMPD said. "That's going to be a key component in the investigation and we're nowhere near being able to speak on that."

Two kids’ bikes & a scooter are in the driveway.

PD says they are going to talk to us any minute now. Stay with @wcnc for updates.

— Ariel Plasencia (@ariel_plasencia) January 14, 2018

Police say nobody else was inside the home where the children were found. The homicides are the Queen City's 2nd and 3rd of 2018.