Update 19:28 UTC : In addition to the 1405 collapsed rooms and 83434 damaged rooms, this has combined with other infrastructure losses to cause at least 350 million CNY damage (around 55 million USD). 12000 people have been relocated and at least 130000 people have been affected. The injury total remains at 3 severely injured and 27 slightly injured.

Update 17:47 UTC : The earthquake did affected six townships in three counties : Eryuan, Yangbi, and Yunlong (9.2 million people). The houses of 17,594 households has damage in various degrees and 83,434 rooms have been reported damaged so far.

Update 13:33 UTC : A far from final report states that 3 people were seriously injured and 27 slightly injured. The material damage is however far reaching. A lot of infrastructure like government buildings, schools, roads, water distribution, electricity have been damaged in various degrees.
At least 2500 houses were damaged and 700 collapsed.  This is only an intermediate report as the assessment is still going on.
No fatalities reported (which will probably will be final).
The most affected county (and city) is Eryuan, a county with a population of 330,000.

Image courtesy and copyright chinanews.com

UPDATE 06:47 UTC:- There have been at least 20 injured, 700 rooms collapsed and 1800 rooms damaged so far in Yunnan. More damage is expected to be counted given the dense population of the area.

UPDATE:- The CENC has stated that it had a magnitude of 5.5 and was 9km in depth. The Yunnan Province Seismological Bureau has started grade IV emergency response which means they are expecting major damage.

This earthquake has likely caused some damage in Dali and Shimen in Yunnan Province of China.

29km (18mi) E of Shimen, China
51km (32mi) WNW of Dali, China
116km (72mi) SSW of Dayan, China
209km (130mi) WSW of Dadukou, China

– See more at: http://earthquake-report.com/2013/03/03/moderate-earthquake-yunnan-china-on-march-3-2013/#sthash.BX17BhRq.dpuf