Venice police investigate bright green liquid in Grand Canal

A gondola navigates along Venice’s historical Grand Canal as a patch of phosphorescent green liquid spreads in the water (Luigi Costantini/AP/PA)

Police in Venice are investigating the source of a phosphorescent green liquid patch that appeared on Sunday in the city’s famed Grand Canal.

The governor of the Veneto region, Luca Zaia, posted a photo of the green liquid that spread through the water near the arched Rialto Bridge.