Meanwhile, in Maltepe, a suspicious package was discovered in front of an Ataturk statue in the courtyard of a municipal police station.
The package -- which bore a note reading "Cizre will be avenged" -- turned out to be a cluster bomb and was detonated by bomb disposal experts.
The pieces of the bomb were taken to a police station for examination.
The note likely referred to the killing of a 12-year-old by police during demonstrations in Cizre, a town in southeast Turkey.
In Sultangazi, another İstanbul neighborhood, a group of people wearing masks left a suspicious package at a bus stop on Adem Yavuz Street.
Upon calls from passersby, police in armored vehicles arrived at the scene and blocked two lanes of traffic.
A bomb disposal team arrived and detonated the bomb.
The initials of the Patriotic Revolutionary Youth Movement (YDG-H), the youth branch of the outlawed Kurdistan Workers` Party (PKK), were written on the package.
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