A wave of explosions rocked southwest Colombia on Tuesday morning, authorities said, killing at least seven people in an attack believed to be targeting the country’s police.

Colombia was rocked by a string of 24 coordinated bomb and gun attacks that killed at least seven people across the country's southwest Tuesday, deepening a security crisis roiling the Andean nation.Security expert Elizabeth Dickinson of the International Crisis Group said the attacks were likely the work of a group known as the Central General Staff (EMC).