US: The deaths of little Savannah and Sabrina Russo has prompted a police investigation

Police have launched an investigation after 15-month-old twin sisters drowned in the bath.

Little Savannah and Sabrina Russo were found unresponsive as their mother, Barbara, uncle and older brother were at home.

Savannah died later that day, on Tuesday last week, while Sabrina lost her fight for life four days later when she was taken off life support on Sunday night.

The twins had been airlifted to Memorial Hermann Children's Hospital following their mother's frantic 911 call after they were discovered underwater.

Neighbours of the family in Pearland, near Houston, Texas, said paramedics were seen performing chest compressions on both girls as they battled to resuscitate them.

Judy Poston said: “My heart goes out to the family. I know that they're grieving.

“The baby had very little brain activity so she's better off where she is.

“I know that you never ever get over the death of a child but with time hopefully they can get on with their lives.”

Police, who are being assisted by Child Protection Services, have yet to rule the deaths an accident or a crime.

Following Sabrina’s death they issued a statement.

It read: “The second twin from the February 17, 2015 incident in the 1400 block of Crystal Lake Circle East has died.

“The 15 month old infant was taken off of life-support devices at approximately 11pm on Sunday, February 22, 2015 and was declared deceased shortly thereafter.”

According to local reports the father of the girls, John Russo, was not at the house when the tragedy happened after recently splitting with his wife.

One local described the family as very quiet saying: “They're just not your typical ‘can I borrow some sugar from you’ kind of neighbour."

Children's Protective Services said they had been involved with the family before and the older child, who is three years old.

They have now removed him from the home and is now with family friends.

“It's very sad, not one baby, but two,' said Lene Owerbach, another neighbour.

“I don't even know what to think it's going to be with them the rest of their lives. It must be devastating to them.”