Afternoon skies in Indonesia's Jambi province of central Sumatra turned "Mars" red as a result of haze caused by worsening forest fires in the surrounding region.
Videos of the province's bright red skies taken on Saturday have gone viral, with internet users comparing local conditions to that of Mars' atmosphere.
Indonesia's Meteorology Climatology and Geophysics Agency said in an online statement that the red skies were caused by a phenomenon called "Mie scattering," when micro-particles brought by pollutants result in a scattering of sunlight.
Indonesia is facing its worst forest fires and haze problems since 2015.
The country has spent months battling fires, often caused by slash-and-burn farming practices, as the El Nino weather pattern exacerbates the annual dry season and helps create a choking haze across the region.