Mother, 28, is detained as person of interest after her three young children are found dead at their LA home

The mother of three young children found dead inside a Los Angeles home has been detained for questioning as a person of interest. 

The children, two boys and a girl who are all under three years old, were found inside a bedroom in their East Los Angeles home around 12.45pm on Monday after a family member called for help.

One of the children was just six months old.  

Los Angeles County Sheriff's Lt Chuck Calderaro said the children were not breathing and efforts to revive them were not successful.

Their 28-year-old mother, who was at home at the time, is being questioned as a 'person of interest', Calderaro said. 

Authorities would not reveal the mother's identity or comment on her mental state. 

Authorities are investigating three young children's deaths in Southern California as suspicious and their mother was detained for questioning on Monday. Pictured: The home where the children were found in East Los Angeles 

Neighbors were spotted embracing on Monday outside the home where the three children were found dead

One other person who was inside the home when police arrived is also being interviewed. Authorities believe that person is the one who called 911.  

The children's father was not there at the time.

Calderaro said it was not immediately clear what caused the deaths and autopsies will be conducted. 

There were 'no obvious signs' trauma, he said.

'At this point it's very preliminary in the investigation,' Calderaro said. 'We know the children were in a bedroom within the house. As far as cause of death that's unknown at this time and that's under investigation.' 

The family had gathered at the home on Sunday for a celebration.  

The children's uncle Arturo Cerezo, who arrived at the home as the mother was being taken into custody, told CBSLA: 'It's pretty hard to determine what really happened.'

'I mean, because, I know her,' he said of the mother. 

'I know she would do anything for those kids, and that’s what’s so hard to understand what happened.'

Preliminary information revealed no prior reports of abuse or child neglect at the home, the sheriff's department said. 

The kids' uncle told CBSLA : 'It's pretty hard to determine what really happened'

Detectives were spotted working the crime scene on Monday after the bodies of the children were discovered

The children's 28-year-old mother, who was at home at the time and has not been identified publicly, is being questioned as a 'person of interest' 

A Los Angeles County Sheriff's official walks near the scene after three young children were found dead in a bedroom at a residence in East Los Angeles on Monday

Supervisor Hilda Solis, whose district includes East Los Angeles, said she was 'devastated' to hear about the deaths.  

'It is a horrifying situation and my office is working with the Los Angeles County Sheriff’s Department and Department of Children and Family Services to launch a full investigation into the brutal murder of these three innocent children,' Solis said in a statement. 

'My office is also leveraging County resources to provide counseling and support for the family and neighboring residents.

'Support services are also being extended to the firefighters and first responders who were the first ones on-site and witnessed this travesty.

'Although I wish this never occurred, we must do everything possible to ensure no other child endures such a tragedy.'

The deaths come after a mother was arrested in the deaths of her three children in April in Los Angeles.

Residents watch as authorities work on the scene after three young children were found dead in a bedroom at a residence in East Los Angeles on Monday

Preliminary information revealed no prior reports of abuse or child neglect at the home, the sheriff's department said