Italian police are investigating the source of a fluorescent green liquid patch that appeared in Venice’s Grand Canal on Sunday 28 May. The bright patch of green spread through the water near the famed Rialto Bridge, with environmental authorities also testing the water. Footage shared by Italy’s fire service shows a number of gondoliers passing on the coloured water. Local reports claim police were looking into whether the green colouring could be a protest by climate activists. Watch more on Independent TV: https://www.independent.co.uk/tv/news/italy-venice-canal-water-green-b2347604.html Click here to subscribe to The Independent: https://bit.ly/Subscribe-to-Independent About The Independent: Making Change Happen. The Independent is the world’s most free-thinking newsbrand, providing global news, commentary and analysis for the independently-minded. Connect with The Independent: Check out our full video catalog: null Videos, daily editorial and more: http://www.theindy.com/ Click here to get the best of The Independent daily: https://www.independent.co.uk/newsletters Like The Independent on Facebook: https://www.fb.com/TheIndependentOnline Follow The Independent on Twitter: https://twitter.com/Independent Follow The Independent on Instagram: https://www.instagram.com/the.independent Download the iOS & Android app: https://www.independent.co.uk/subscribe/app Help to support truly independent journalism. Every dollar you contribute will directly fund additional special reports and investigations from a free-thinking, award-winning newsroom you can trust - https://www.independent.co.uk/donations Subscribe to Independent Premium for exclusive content & live events: https://bit.ly/2MiOONB