ANKARA: Turkish police on Monday (Tuesday in Manila) arrested at least 20 people across Istanbul for taking part in last week’s deadly anti-government protests, local media reported. Anti-terror police units, backed by helicopters, sealed off the restive district of Okmeydani where two people were killed during battles between law enforcement officers and protestors, NTV television channel reported. Turkey has launched an investigation into the deaths of the two men, who were not among the demonstrators. Ugur Kurt, 30, was shot in the head while attending a funeral. Ayhan Yilmaz, 42, was hit by a hand grenade thrown during the unrest.