Chinese authorities in Tibetan-populated regions have increased security in the wake of a series of Tibetan protests and ahead of several politically sensitive dates.
Lhasa was on full alert in the lead up to Tibetan New Year, or Losar, on Feb. 25, while tensions remain high ahead of the one-year anniversary of riots that erupted in Lhasa on March 14, 2008 and quickly spread throughout Tibetan regions of China. March 10 also marks the 50th anniversary of a failed uprising against Chinese rule that prompted the Tibetan spiritual leader, the Dalai Lama, to flee into exile.