A Chinese ship in the Indian Ocean has reportedly detected a pulse signal as teams continue to search for the missing Malaysian jetliner.
It hasn't been established, though, whether the signal is related to the plane.
Crews started searching underwater yesterday, in hopes to detect a signal from the plane's black box before the batteries die.
The batteries last about 30 days, which would be on Monday.
The Boeing 777 went missing last month with 239 people onboard.