Steve Neavling

Four people accused of killing a DEA agent during an attempted robbery in Columbia last week are in custody, CNN reports.

Columbia’s National Police apprehended the suspects and said two more are on the loose.

The U.S. plans to request extradition, CNN wrote.

Special Agent James “Terry” Watson was working on assignment on Bogata when he was stabbed to death in a tax cab Thursday.

“The homicide of the DEA agent was committed by common criminals and was not connected to his work in Colombia,” National Police Director Gen. Jose Roberto Leon Riano said.