Xinhua world news summary at 1530 GMT, Aug. 21

SARAJEVO -- A school employee shot and killed at least three people and wounded several others on Wednesday in a town in northwestern Bosnia and Herzegovina (BiH), local police said.

The shooting occurred around 10:00 a.m. local time (0800 GMT) in a secondary school in Sanski Most, about 300 kilometers northwest of BiH's capital, Sarajevo. (BiH-Shooting-Death)

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TEHRAN -- At least 28 people w