In Dhaka, the capital of Bangladesh, people are celebrating the important Muslim holiday Eid al-Adha, with an annual feast to honor Ibrahim, who was willing to sacrifice his son for divine purposes until God had an angel intervene.

Part of that celebration, traditionally, is the sacrifice of an animal, which can be a bloody process. Dhaka’s streets bear proof: pictures on social media and elsewhere revealed rivers of blood from sacrificed animals.

The red-hued rivers are not all blood, as heavy rains in recent days had previously flooded the streets. But there was enough of it to make for some dramatic and gory imagery.

According to the Dhaka Tribune, locals blamed the city for not fixing drainage problems ahead of the feast, leading to the flooded (and probably unsanitary) conditions. There was also, apparently, a problem with communication. Many celebrants ignored designated slaughter spots, instead opting to kill animals in the streets near their homes, according to the Tribune

After that came the deluge.