Global oil prices tumbled on Tuesday, with Brent crude slipping below the $80-per-barrel mark for the first time since March, as investors...

Brent crude oil prices fell to their lowest levels since early March as traders grew more confident about an imminent peace agreement between the US and Iran.

Brent crude futures falls $4.08 to $83.25 a barrel and US West Texas Intermediate falls $4.35 to $80.53.