'Promising lead' emerges in hunt for Flight 370

PERTH, Australia (AP) — A concentrated air and sea search was underway in the Indian Ocean on Tuesday after an Australian ship detected faint pings deep underwater in what an official called the “most promising lead” yet in the search for Flight 370.

Up to 14 planes and as many ships were focusing on a single search area covering 77, 580 square kilometers (29,954 square miles) of ocean, 2,270 kilometers (1,400 miles) northwest of the Australian west coast city of Perth, said the Joint Agency Coordination Center, which is overseeing the operation.