The son of Mexican drug lord Joaquín Guzmán may have accidentally given away his fugitive father's location after tweeting a photo of them both that revealed they were in Costa Rica.

Jesus Alfredo Guzmán Salazar posted a photo of himself and his dad - known as "El Chapo" - eating in a restaurant.

But he appeared to forget to disable a location feature that reveals where an image is taken.

Authorities are now investigating whether "El Chapo" - fled to the central American country after his dramatic escape from Mexico's maximum security prison in July.

Jesus Alfredo Guzmán regularly writes about his father on social media.

The 29-year-old uploaded the image on Monday with the caption, “August here, you already know with whom”.

It is the first piece of evidence to show suggest where the drug baron is.