A father has spoken of the death of his two sons who were passengers on a helicopter tour of the Grand Canyon when it crashed over the weekend, killing three people.

Stuart Hill, 30, and Jason Hill, 32, were visiting the Grand Canyon with friends to celebrate Stuart's 30th birthday.

Their father, David Hill, this morning described them as "wonderful boys" who were "inseparable".

The brother's had been saving for the trip with a group of friends for over a year.

The Eurocopter EC130 crashed in unknown circumstances killing brothers Jason and Stuart, as well as Stuart's girlfriend Becky Dobson, 27, and leaving newlywed couple Jonathan Udall, 32, and Ellie Milward, 29, as well as Jason's girlfriend Jennifer Barham, 39, and pilot, Scott Booth, 42, fighting for their lives.