3-year-old child thrown from 22nd floor apartment in Chongqing, China... 37-year-old mother detained - Chinese report

In Chongqing, China, a mother in her 30s threw her 3-year-old child to his death from a 22nd floor apartment building. According to Chongqing City's Banan District Police, around 7 a.m. on the 1st (local time)
Time), a 37-year-old resident of the same ward slashed her mother-in-law, Mr. A, with a kitchen knife at her home on the 22nd floor of an apartment complex, and then threw her 3-year-old child out of the window, killing her.
According to a report in the Chinese media outlet Penghu News, there was another child at home, but this child was unharmed. In addition, Mr. A, who was cut with a kitchen knife, was taken to the hospital.
He is receiving treatment and his injuries are not life-threatening. Residents in the area say that someone has been mentally unstable and has been behaving strangely recently.
Police currently have a number of people in custody and are investigating the circumstances surrounding the incident.