The Latest on a deadly duplex fire outside Pittsburgh (all times local):

4:40 p.m.

Authorities say a Pennsylvania duplex fire that killed three children and their mother also has killed their father.

Officials in Allegheny County say Stephen Lasch died Saturday. They say he was the children's father and the woman's husband.

Lasch was critically injured in the Friday night blaze in the Pittsburgh suburb Bellevue.

The medical examiner's office said earlier Angela Lasch was pronounced dead along with 11-year-old son Noah, 6-year-old daughter Kayley and 4-year-old daughter Hannah.

Officials say two people living on the other side of the duplex escaped.

The county fire marshal is investigating the cause of the blaze but says it doesn't appear to be suspicious.

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3 p.m.

A fire official says the blaze in a western Pennsylvania duplex that killed a mother and three children and critically injured another adult doesn't appear suspicious.

Officials in Allegheny County say the blaze was reported just after 9:30 p.m. Friday in the Pittsburgh suburb of Bellevue. Fire crews arrived to find flames coming from a first-floor window on one side of the duplex and found "five unresponsive victims" inside.

The county medical examiner's office said 38-year-old Angela Lasch was pronounced dead along with her 11-year-old son Noah and two daughters, 6-year-old Kayley and 4-year-old Hannah. The remaining adult was in critical condition at a local trauma center.

Officials said two people living on the other side of the duplex were able to escape.

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9:30 a.m.

Authorities say a mother and three children died and another adult was injured in a duplex fire in western Pennsylvania.

Officials in Allegheny County say the blaze was reported just after 9:30 p.m. Friday in the Pittsburgh suburb of Bellevue.

Bellevue fire chief Glenn Pritchard said arriving crews found "heavy fire" coming out of the left side of the duplex and pulled five victims from the home.

The medical examiner's office said 38-year-old Angela Lasch was pronounced dead along with her 11-year-old son Noah and two daughters, 6-year-old Kayley and 4-year-old Hannah.

Officials said two people living on the other side of the duplex were able to escape.

The county fire marshal is investigating the cause of the blaze.