Violent eruption of Ecuador volcano likely, expert says

Ecuador's Tungurahua volcano spewed ash and incandescent rocks from its crater on Thursday as experts warned that a more violent eruption is likely.

Tungurahua shot a 5-kilometer (3-mile) column of ash into the sky, and fiery rocks rolled down its flanks. The volcano in central Ecuador had spewed ash 6 miles (10 kilometers) into the air on Wednesday.

"The volcano is continues to be very unstable," Hugo Yepes, director of Ecuador's Geophysics Institute said in a news conference, adding that there are "strong possibilities" that a stronger eruption will occur.

"There are no certainties, but the coming ... hours and days …