Four people were killed, including a child, when a helicopter slammed into a radio tower behind homes in Houston’s Second Ward, causing a fiery explosion and toppling the structure and scattering debris through the neighborhood,

A helicopter crashed into a radio tower near downtown Houston Sunday night, killing four people on board, including a child, fire officials said.

The National Transportation Safety Board said in a statement that it is investigating the crash of the Robinson R44 II helicopter, which preliminary information shows was operating as an air tour