ATF: South Kansas City explosion caused by manufacturing of illegal fireworks

People inside of a south Kansas City house that exploded Wednesday night were making illegal fireworks, federal officials said Friday.

Investigators with the Bureau of Alcohol, Tobacco, Firearms and Explosives concluded their preliminary examination of the residence located in 9100 block of Tennessee Avenue Friday.

Evidence recovered from the remains showed fireworks were made in the basement, said John Ham, AFT spokesman.

The explosion knocked the house off its foundation and injured six people, two of them critically. Two adults, age 51 and 52, reportedly lost limbs. Two women and two children also were treated for injuries.

“This is a very dangerous undertaking and we clearly see the results of what has happened here,” Ham said.

This story was originally published June 6, 2014 at 3:27 PM with the headline "ATF: South Kansas City explosion caused by manufacturing of illegal fireworks."