East Haven police released on Wednesday a 911 recording from an East Haven gas leak at a house where two children were found dead and their mother was found injured.

The call, which was placed Tuesday at around 2:40 p.m., was from a friend of the 36-year-old mother of the two children. The friend sounded overwhelmed with emotion, telling the dispatcher that she was outside the house and couldn't get in and that the children's mother had told her over the phone that she had cut herself.

"My friend sent me a letter that she was going to kill herself," the friend also told the dispatcher.

A 7-year-old girl and her 5-year-old brother were found dead inside the house, and their mother was being treated at a hospital for non-life threatening arm wounds, officials said. When police arrived, the mother was despondent, authorities said.

Authorities hadn't released the family members' names as of Wednesday afternoon. The children's father, who is from Bridgeport, was notified and was "devastated," police said.

Bridgeport Mayor Bill Finch expressed condolences to the father. "We want him to know that our community is here to support him in this terrible time."

Investigators are awaiting a report from a medical examiner in the case. Autopsies were planned.