Tropical cyclone threatens to impede search

Effort said to be at 'critical juncture' as mini-sub nears end of mission

A tropical cyclone threatened to hamper the search for Malaysia Airlines Flight MH370 in a remote stretch of the Indian Ocean on Monday, as a submarine drone neared the end of its mission scouring the seabed with still no sign of wreckage.

The Australia-led multinational search for MH370, which vanished on March 8 with 239 people including 154 Chinese passengers on board, narrowed to a 10-square-kilometer patch of sea floor about 2,000 km west of the Australian city of Perth, Reuters reported.