Police helicopters circling Grenfell Tower during the fire confused some residents into believing they would be rescued.
Independent investigators are to probe an official complaint about the use of police helicopters during the blaze - writes itv.com.
The IPCC said a complaint was made by a person who lost several family members in the disaster.
They believe residents stayed inside the building with the mistaken hope of a helicopter rescue.
They also claim the downdraft from the helicopters fanned the flames, worsening the fire.