Gabby Petito was strangled, says coroner

Gabrielle ‘Gabby’ Petito talking to a police officer after police pulled over the van she was travelling in with her boyfriend, Brian Laundrie, near the entrance to Arches National Park on August 12 (The Moab Police Department via AP)

Cross-country traveller Gabby Petito was strangled, a US coroner has said.

Ms Petito, 22, died three to four weeks before her body was found on September 19 near an undeveloped camping area along the border of Grand Teton National Park in remote northern Wyoming, Teton county coroner Dr Brent Blue said in a news conference.