By Hyunjoo Jin and Hyunsu Yim SEOUL (Reuters) -South Korean police said on Thursday they had raided Jeju Air and the operator of Muan International Airport as part of their investigation into Sunday's crash that killed 179 people in the worst aviation disaster on the country's soil.

The sounds of sobbing, prayers and anguish echoed through the departures hall of an airport in southwestern South Korea on Monday as families of the victims aboard a passenger jet that crash landed over the weekend waited for their loved ones to be identified.

The death toll was expected to rise further, as the rest of the people aboard the plane remained missing about six hours after the incident.