Chile on edge as worst unrest in three decades claims 11 lives

More clashes likely after Pinera expands state of emergency following 'weekend of rage'

Latin America's most prosperous country is braced for fresh upheaval after Chile's president expanded a state of emergency beyond the capital and the death toll from three days of violence rose to 11.

"We are at war with a powerful and uncompromising enemy that respects nothing and no one," Sebastiin Pinera declared in an unyielding late-night address on Sunday.