Kansas City, Mo. ? Three people died and one child was on life support after a fire broke out in their home on the city’s northeast side early Tuesday.

In another fire Monday evening at a Midtown high-rise apartment building, more than a dozen people were injured and about 100 were evacuated from their apartments.

In the fatal home fire, officials said 10 members of an extended family lived in the three-story building. Six people were able to escape, but the firefighters discovered the four victims on the second floor when they arrived about 3:15 a.m.

Relatives identified the dead as Babette Bomar, her 10-year-old son, David, and the child’s 62-year-old grandmother, Gayla Ann Bomar. All three died of smoke inhalation and carbon-monoxide poisoning.

Babette Bomar’s 11-year-old son, Chris, was in critical condition Tuesday night at Children’s Mercy Hospital.

Four of Babette Bomar’s other children suffered minor injuries and were taken to hospitals. Two others, an adult cousin and a 16-year-old family friend, also escaped.

The only working smoke detector in the building was in a stairway between the second and third floors. The door on the second floor may have been closed, which means the victims may not have heard the alarm, said Jim Duddy, assistant chief fire marshal.

The fire appeared to start in a first-floor dining room near the back, but a cause had not been determined, Duddy said.

Bobby Bixby, a next-door neighbor, said he and his wife saw the home engulfed in flames when they woke up about 2:30 a.m. He ran outside but said heat from the fire stopped him from getting near the house.

“It was like a wall of heat,” Bixby said. “There was just no way anyone was going to get in there.”

Fire officials said the blaze proves the necessity of having working smoke detectors throughout the house. They said the three-story home was too big to have only one detector, and that one was not properly placed. Because the family rented the home, it was the owner’s responsibility to provide the smoke detectors.

“The location of the smoke detector might have helped if someone had been on the third floor,” said Greg Vincent, chief fire marshal. “But with the victims all below, it didn’t do much good.”

The Kansas City Fire Department provides and installs free smoke detectors to anyone who asks for them.

“There is no excuse for not having them,” Vincent said.

In the high-rise apartment fire Monday evening, firefighters used aerial ladders to reach the eighth floor of the nine-story Ambassador building.

The building, the former Ambassador Hotel, had more than 100 apartment units. On Tuesday, residents on the seventh through ninth floors were told they would have to relocate. Those on the first through sixth floors were able to return.