Police investigating suspicious deaths of 14-year-old twins and their mother

A mother from Vallejo and her twin daughters lost their lives in a fire over the weekend. Officers patrolling the area investigated when they smelled smoke.

The Vallejo Police Department released a statement saying that officers struggled to gain entry into the home and firefighters removed Trinh and Tram Tran and their mother from the burning building.

One of the daughters passed away on the scene, while the mother and the other daughter succumbed to their injuries at the hospital.

A fourth victim, an 11-year-old girl, is expected to make a full recovery. Read more on our Twitter, @amomama_usa.

Lieutenant Jason Potts said the house was "fully engulfed, and that the origin of the blaze is not yet known. Authorities are treating the case as a criminal investigation.

A friend of the 14-year-old twins told CBS Local that their relationship with their father was strained. She received texts from one of the girls earlier that day, saying she was "really scared."

The friend, Sarah Dilag, expressed guilt at not seeing the message and responding but added that she was asleep at the time. She told reporters:

“It’s really sad to hear that that was her last words to me. That she feels really scared. But I couldn’t read it because I was asleep.”

The twins recently enrolled at the Jesse Bethel High School. Both were talented musicians and they joined the school band:

Their coach told Lilian Kim from ABC News that both were "amazing kids," and members of the community paid their respects to their 11-year-old sister who survived the blaze.

Anyone with information regarding the case can contact the Police Department (707) 648-4080 or (800) 488-9383. The case number, to be quoted on correspondence, is 18-9877.

Earlier this year, singer and producer Robbie Williams was at the Mandarin Oriental Hotel in London when a fire broke out. Read more about it "Robbie Williams among those evacuated from London hotel fire."