A policeman was killed when a fellow policeman opened fire at him while performing duty in the capital's Baridhara late on Saturday night.
The incident took place in front of the Palestinian Embassy in Dhaka.
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Another pedestrian was injured in the incident, said Mazarul Islam, officer-in-charge (OC) of Gulshan Police Station.
The identity of the victim is yet to be confirmed.
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"We heard the news and are heading towards the spot," said the OC, adding that the details will be known later.