UPDATE 5:11 p.m.:
Previous reports of local authorities having detained one of the three suspects have been rescinded, meaning all three individuals are currently at large and still considered dangerous.
UPDATE 1:17 p.m.:
Local authorities reportedly have one of the three suspects in custody. The remaining two individuals are believed to be still on the loose, according to CNN.
See original story below.
A police officer was killed on Tuesday following a foot chase of some sort in Lake County, a suburb on the outside of Chicago. The officer reportedly called for backup before being found dead from a gunshot wound and stripped of his equipment, according to the Associated Press. A massive manhunt is currently underway for the three suspects, including helicopters and officers on foot:
The suspects are considered armed and dangerous, though no definitive descriptions aside from "two white males and a black male" have been released:
A K-9 unit associated with the search team has reportedly "picked up a scent" near a swampy area off Rainier Way and Rollins Road, according to CBS News. The identity of the deceased officer has not been released, though he was revealed to be a 32-year veteran of the force.
This story is developing.