Three young children, who were all under the age of three, were found dead inside a home in East Los Angeles on Monday afternoon. Their 28-year-old mother was questioned by the police regarding the deaths.

Responding to a call in the 600 block of Ferris Avenue, cops of the Los Angeles County Sheriff's Department reached the scene where they found two young boys and a little girl unresponsive in a bedroom at the home. They were pronounced dead at the scene, reported FOX 11.

It wasn’t immediately clear how the children had died, but they didn't appear to have suffered physical trauma. The children’s mother was inside the home when the police arrived. She was questioned on Monday as a person of interest, reported Los Angeles Times.

Lt. Charles Calderaro said that there was another person in the house when the deputies reached the house. The person was possibly a relative of the children, and authorities believe that was the person who called the police. The lieutenant said that it did not appear that the county Department of Children and Family Services was involved with the kids, although he mentioned that this information was preliminary.

The one-story beige house had a large trampoline in the front yard, two colorful bird cages hanging on the porch, a sign congratulating this year’s graduates of Garfield High School over the entryway. Neighbor Victor Ohm used to often see the children playing outside in the yard whenever he went out to buy groceries. "It's heartbreaking. They were happy kids," he said.

As of late Monday night, officials had not ruled out the children's death as accidental.

This comes three months after three young children were found dead in an apartment in Reseda. Initial reports suggested that the kids had been stabbed, but authorities did not confirm a cause of death.

The victims' neighbor Mishal Hashimi said, "This happened right in front of our apartment. It’s too close to us.” She said that she was shocked to learn that a mother was suspected of murdering her kids. “Nobody would believe a parent would do such a thing to their own children. If you have a child, you know how innocent they are," Hashimi added.

The children's mother was later arrested in connection with the case, reported Los Angeles Times.

Police 'Do Not Cross' sign
A police 'Do Not Cross' sign placed outside Trump Tower on Fifth Avenue during the coronavirus pandemic on May 2, 2020 in New York City. COVID-19 has spread to most countries around the world, claiming over 244,000 lives with over 3.4 million infections reported. Photo by Noam Galai/Getty Images