Police detained another five people in central Istanbul for carrying gas masks and marbles, Today`s Zaman newspaper reported.
On Wednesday, the Istanbul Governorate declared that Taksim Square would be closed to the public on May Day for security reasons, after major protests broke out there on the holiday in 2013 and 2014, which led to weeks-long anti-government unrest across the country.
President Recep Tayip Erdogan`s security law, adopted in January, has been condemned by the opposition, which considers it to be stifling anti-government protest.
The legislation expands police powers, authorizing them to search people when there are "reasonable doubts" and detain them for an indefinite amount of time.
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