On Friday, Chilean capital Santiago witnessed a massive rally wherein another casualty was reported, taking the overall death toll to 29.
Meanwhile, President Pinera in an interview said that the videos showing abuse of protesters by Chilean police on social media were "fake news", news agency Reuters reported.
Pinera went on to say that the unrest was being stirred by foreign governments.
The president told CNN Chile in an interview that there had been a "gigantic" disinformation campaign with videos circulating on Facebook, Instagram and Twitter that had been "filmed outside of Chile or misrepresented", Reuters reported.
Pinera's claims were met with fury from both his political opponents and members of his governing coalition.