A keyword search led to a report by ‘The Observers - France 24’ titled “Why ‘rivers of blood’ flowed through Bangladesh’s capital” published on 16/09/2016.
The report explained that heavy rain on the day of Eid al-Adha caused blood from animal sacrifices to mix with rainwater, flooding the streets of Dhaka with red water.
Approximately 15 million people live in Dhaka, a city that is 90% Muslim. Local authorities designated about 1,000 sites for animal sacrifices to manage the aftermath, but many residents were unaware or found these sites too far from their homes. Consequently, sacrifices were performed in various locations, leading to the widespread blood seen in the photos.
We also found similar reports published in BBC and The Guardian.
Eid al-Adha is a significant Muslim celebration where families traditionally sacrifice an animal, usually a sheep, to commemorate the prophet Abraham. In Dhaka, heavy rain on the day of Eid caused streets to flood, creating red rivers from the sacrifices conducted the previous night.
The photos circulating online are from an incident that occurred 8 years ago and are not related to recent events. Hence, the claim that these pictures are from the latest Eid celebration is misleading.