The Latest: Autopsies planned for helicopter crash victims

In this Saturday, Feb. 10, 2018, photo, a survivor, lower right, walks away from the scene of a deadly tour helicopter crash along the jagged rocks of

This is an undated family handout photo issued by Britain's Foreign & Commonwealth Office and made available on Tuesday Feb. 13, 2018 of Stuart Hill

In this Saturday, Feb. 10, 2018, photo, emergency personnel arrive at the scene of a deadly tour helicopter crash along the jagged rocks of the Grand

FLAGSTAFF, Ariz. (AP) — The Latest on a helicopter crash at the Grand Canyon (all times local):

12:05 p.m.

An Arizona medical examiner will conduct autopsies on three British tourists who died after their sightseeing helicopter crashed in the Grand Canyon.

The Mohave County Medical Examiner's Office says autopsies on the trio are expected to be completed by Tuesday afternoon.

The victims have been identified as 27-year-old Becky Dobson, 27; her boyfriend, 30-year-old Stuart Hill; and his brother, 32-year-old Jason Hill.

Family members say they were celebrating Stuart Hill's birthday with a group of friends.

Four other people, including the pilot, remain hospitalized.

The EC-130 crashed Saturday on tribal land that has fewer regulations for air tours than the national park.

___

12:15 a.m.

Six British friends on a sightseeing helicopter to a busy stretch of the Grand Canyon crashed on tribal land that is less regulated than the national park.

Three British tourists died and four others were critically injured, leaving federal investigators to determine what led the group's birthday celebration to end in tragedy.

Aviation attorney Gary C. Robb says investigators are likely to pay special attention to the EC-130 helicopter that flew Saturday. It generally lacks a system to keep it from exploding on impact, denying passengers a few extra minutes to try to escape.

The company that operated the helicopter says it's cooperating with the investigation and abides by flight safety regulations that exceed those required by the FAA.

Hualapai tribal leaders said they're halting helicopter tours at the canyon for now.