Taipei - Some 30 Taipei residents were being treated for discomfort caused by a mysterious powder which spilled out of a broken bottle on a Taipei street Tuesday.

The incident occurred Tuesday morning on Chunghua Road when a glass bottle fell from a vehicle and was run over by another car, releasing a yellow powder from the bottle, cable television channel ETTV said.

The powder flowed into the air, causing itchy eyes and breathing difficulties to some 30 passers-by and motorcyclists.

The affected people were sent to several hospitals and police are analyzing samples of the yellow powder to determine its composition. (dpa)