Residents in the northern Chinese city of Tianjin are fleeing their homes fearing an "earthquake" after a massive explosion on Wednesday night.

China's Xinhua News Service tweeted:

Cell phone videos are appearing online:

A Reddit thread in the /r/China community claimed that the blast was a gas explosion that went off by the docks in Tianjin's harbor.

Raw Story is attempting to verify this and will report more details as they become available.