The suspect in the mass shooting at a church in South Carolina has been arrested.
Police say the 21－year－old suspect Dylann Roof was tracked down in North Carolina.
Nine people were killed when a gunman opened fire on members of an African－American church in the small town of Charleston on Wednesday night， local time.
Police say the shooting was a hate crime， targeting African Americans.
Reacting to the tragedy，... U.S. President Barack Obama called for a shift in how the U.S. thinks about gun violence.
Speaking at a press conference in South Carolina following the shooting，... Obama said the U.S. would have to，... at some point，... ask itself why such mass violence does not happen in other advanced countries.
