PERTH, Australia (AP) — A warship with an aircraft black box detector was set to depart Australia on Sunday to join the search for the missing Malaysian jetliner, a day after ships plucked objects from the Indian Ocean to determine whether they were related to the missing plane. None were confirmed to be from the plane, leaving searchers with no sign of the jet more than three weeks after it disappeared.

Twenty-nine Chinese family members, seeking answers from Malaysia’s government as to what happened to their loved ones, arrived in Kuala Lumpur on Sunday, said Malaysia Airlines commercial director Hugh Dunleavy. Two-thirds of the 227 passengers aboard Flight 370 were Chinese, and their relatives have expressed deep frustration with Malaysian authorities since the plane went missing.