Laos plane crash probe hones in on black box

Investigators in Laos have picked up underwater signals that they believe are coming from the black box of a passenger plane that crashed into the Mekong River last week.

The Lao Airlines ATR-72 turboprop plane crashed on Wednesday after getting caught in a heavy storm as it approached Pakse Airport in southern Laos. All 49 people on board are presumed dead.