Typhoon Muifa approaching Japan's Okinawa islands

Weather officials in Japan warn a powerful typhoon is approaching the southern prefecture of Okinawa. They say Typhoon Muifa could bring strong winds and rough seas to some areas.

The Meteorological Agency says Muifa was moving northwest over waters south of Okinawa on Sunday morning, Japan time. It says the storm was traveling at a speed of 15 kilometers per hour.

The agency expects Muifa to maintain its strength as it moves north. Authorities say it is likely the storm will approach the Sakishima Islands as early as Monday.

They say fierce winds may start lashing the area on Sunday evening. Agency officials have issued a warning for strong winds in the Ishigaki area.

Officials point out the storm is moving slowly. They say that means the rough conditions will last for an extended period of time. They also say waves may reach a height of 10 meters around the Yaeyama and Miyakojima regions.