ISTANBUL (AP) — Riot police clashed with anti-government protesters in Istanbul and other Turkish cities following Wednesday’s funeral of a teenager, who had been in a coma since a police tear-gas canister struck him in the head last year.

Police fired water cannons and tear gas to stop a crowd of thousands from reaching Istanbul’s main square following a funeral service for 15-year old Berkin Elvan. Anti-government protests have flared since Berkin’s death Tuesday.