BBC: Nearly 600 people have been arrested in Istanbul as police launched a dramatic clampdown on left-wing demonstrators trying to hold a May Day rally.
Officers fired tear gas and used batons to stop the crowd marching to Taksim Square, where they were due to mark the 30th anniversary of "Bloody May Day". Hundreds detained in Turkey rally (Read on)
WATCH BBC VIDEO: Clashes at Turkey rally
TIMESONLINE: Appeal for calm as markets get jitters over Turkey crisis
Mark Alexander
