At least 20 people have been killed in Buenos Aires, Argentina, foreign media reports say. Foreign media further reports that the victims were drug addicts.

Authorities suspect that the group had consumed cocaine and that it contained a poisonous substance.

In addition to the dead, nearly 50 others are being treated at hospitals, according to foreign media reports.

 According to the foreign media reports quoting the authorities in that country, if there are people who have bought drugs in the last 24 hours and are still in possession of them, they have requested to dispose of them.

 Nine persons have been arrested in connection with the incident.