Beijing says bus security tightened after blasts

China has tightened security on buses in Olympic host city Beijing following a pair of deadly explosions on public buses in the country's southwest, the Games' top security official said Wednesday.

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Yunnan's top health official Chen Juemin visits the injured bus driver in a local hospital on Monday. more>>

A passenger injured in the bus explosion Monday morning is under operation in a local hospital. more>>

Frightened passengers are seen sitting on the ground after being helped out from the exploded bus. more>>

The bus hit by an explosion is seen in Kunming, capital of southwest China's Yunnan Province, July 21, 2008. more>>