Pictures: On the ground with the #UmbrellaRevolution in Hong Kong

It's been hailed on social media as the umbrella revolution as thousands of protesters shelter from tear gas on the streets of Hong Kong.

#OccupyCentral trending on Instagram before it was blocked

Images have emerged on Instagram under the hash tags #umbrellarevolution and #occupycentral revealing young pro-democracy demonstrators holding umbrellas to protect themselves from tear gas.

Hong Kong protests: Chaotic scenes as police unleash tear gas