MIAMI (AP) -- Forecasters say Hurricane Igor has rapidly strengthened to a Category 4 storm in the open Atlantic. It doesn't immediately threaten land.
Meanwhile, a tropical depression off the coast of Africa prompted officials to issue a tropical storm warning for parts of the Cape Verde Islands on Sunday.
Igor had maximum sustained winds of 135 mph (215 kph) and was moving west at 14 mph (22 kph). Some additional strengthening is expected in the next two days.
The center of the storm was located about 1,120 miles (1,800 km) east of the Northern Leeward Islands.
Forecasters also warned that the newly formed depression could strengthen into a tropical storm as early as Sunday night. The storm warning was issued for the southern Cape Verde Islands, including Maio, Sao Tiago, Fogo and Brava.
MIAMI (WKOW) -- Igor has strengthened to hurricane strength, making it the fourth hurricane of the Atlantic season to reach maximum winds close to 75 miles per hour.
Sunday morning, Igor was only a Category 1 but it continues to gather strength and Igor is expected to become a major hurricane by Monday.
It was still far from land Sunday morning, just west of the Cape Verde islands.
MIAMI (WKOW) -- Tropical Storm Igor will likely become a hurricane later Saturday.
Igor is swirling over the open Atlantic Ocean and was about 915 miles west of the Cape Verde Islands early Saturday morning.
The storm's maximum winds have neared 70 mph.