A 7.2 magnitude earthquake has struck western Haiti, the United States Geological Survey said, prompting a tsunami alert and damaging buildings in the disaster-plagued Caribbean nation. The epicentre of the quake on Saturday was about 160km (100 miles) by road from central Port-au-Prince, the densely populated capital, at a depth of 10km, the USGS said. - Subscribe to our channel: aje.io/AJSubscribe - Follow us on Twitter: twitter.com/AJEnglish - Find us on Facebook: www.facebook.com/aljazeera - Check our website: www.aljazeera.com/ #AlJazeeraEnglish #BreakingNews #Earthquake