Are the World Student Games in Russia using 'forced labour'?

Kazan in eastern Russia has witnessed a flurry of building activity over the last five years as the city prepared to host the Universiade - or World Student Games - running from 6 to 17 July.

But some teachers and nurses say they were put under pressure to help construct and clean a number of the venues. They claim they were told their jobs could be under threat if they refused.

BBC Russian Service's Olga Ivshina reports.