An instructor and his student died when a flight school helicopter crashed Wednesday in a neighborhood on the outskirts of Rio de Janeiro, Brazilian emergency services officials said.

The accident occurred around 8:00 a.m. in Sierra de Grota Funda, a small hilly area that separates the Barra de Tijuca district from the populous Campo Grande and Santa Cruz sections.

The aircraft exploded and was destroyed after crashing in a wooded area.

The cause of the accident has not been determined, but there was fog in the area at the time of the crash, the fire department said.

The helicopter, which belonged to Escuela de Pilotaje Rio 22, had taken off from Jacarepagua air field minutes before it went down.

Silvestre Neto, a 34-year-old flight instructor, and an 18-year-old student, identified only as Felipe, died in the crash. EFE