BELGRADE, Serbia (AP) — Serbian university students left piles of old school books outside the education ministry building on Friday as part of almost daily street protests demanding accountability over the collapse nearly two months ago of a concrete canopy that killed 15 people in the country's north.

Scattered traffic blockades were also held on various locations throughout Serbia at 11:52 a.m. — the exact time that the concrete construction on the front of the railway station building in Novi Sad crashed onto the people below. The traffic blockades have been held every Friday since the Nov. 1 crash, lasting 15 minutes for the 15 victims.

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