Turkish police used tear gas on protestors to prevent an International Workers’ Day march to the symbolically important Taksim Square in the metropolis of Istanbul on Wednesday. Footage from CNN Türk showed the police action. There were also scuffles between demonstrators and police. Security forces in several rows blocked the route from the Sarachane district to Taksim Square, several kilometres away. More than 70 people were detained, according to media reports. The authorities had issued a ban on demonstrations in the square and cordoned off a large area of the centre, saying it was needed …