Arrests in Argentina after poisoned narcotics kill 20

The Security Minister for Buenos Aires province assured residents on Thursday that the leader of a drug gang responsible for distributing poisoned cocaine was arrested along with two others. Twenty people died and 74 others were hospitalized after ingesting the poisoned narcotic.

Police had confiscated 15,000 small bags of the contaminated drug as of Thursday, and arrested seven people, Buenos Aires province's federal crimes unit said in a statement. 

Toxicology tests to determine which substance was mixed with the cocaine haven't yet been completed. Authorities are investigating whether its toxic composition was accidental, or an attempt at score settling between rival gangs.