AKIPRESS.COM - Confusion abounded at the Maria Lenk Aquatics Centre as the normally azure pool water turned a swampy green for the women's synchronised 10m platform final, BBC reports.

Divers were forced to compete in water the colour sea lions - rather than Olympians - are accustomed to performing in.

A statement from Rio 2016 organizers said water tests were conducted and there is no risk to athletes. Organizers said they're investigating what caused the colour change.

Rio spokesman Mario Andrada said the green was caused "by a proliferation of algae."

"This was because of heat and a lack of wind," he said. "We did all the chemical tests. The pool will be blue tomorrow (Wednesday).

"If it were green and yellow, we would know it was a patriotic thing," Andrada joked, referring to Brazil's national colours. "We did test the water using the same parameters we do every day, and the results were exactly the same as we got when the pool was blue."