1222 GMT December 02, 2021
Chile has strict rules on mask wearing in all public places and violations are punishable with sanctions that include fines and even jail terms, according to Reuters.
Pinera apologized then turned himself in shortly after the selfie surfaced on social media in early December.
The president explained he had been walking alone along the beach near his home in the posh Chilean seaside town of Cachagua when a woman recognized him and asked for a photo together.
The selfie shows the president and the woman, neither wearing masks.
The virus peaked in Chile in May and June, during the southern hemisphere winter, then subsided through November. Cases are on the rise again, however, prompting new restrictions and quarantines.
Chile has reported 581,135 cases of the virus since the outbreak began in March, and 16,051 deaths from the disease.