The impact area where a medical transportation plane crashed in Philadelphia last week will hopefully reopen on Wednesday.

At least seven people were killed and 19 were injured when an air ambulance crashed to the ground on a busy Philadelphia street, creating what witnesses described as a massive fireball and a chaotic street scene.

Authorities say a building caught fire and later collapsed in north Philadelphia, killing one firefighter and injuring five other people after all became trapped.

PHILADELPHIA A woman and her three children were found dead after a house fire in Philadelphia, authorities said. Sixty firefighters, medics and support workers responded to what he called an aggressive interior attack" as crews pushed hoses into the building, he said. A 35-year-old woman was found downstairs, and her three children 9-year-old and 17-year-old males and an 11-year-old female were found upstairs, police said. All were pronounced dead at the scene by a medic unit just after 8 a.m. Saturday. Javon Davis, assistant deputy fire commissioner, said the city medical examiner will determine whether the deaths were fire-related.