Alexis Tsipras speaking at campaign rally in Thessaloniki, Greece

Greek teachers and other public sector workers keep up pressure on thegovernment over latest round of austerity measures.

Greek teachers and other public sector workers keep up pressure on the government over latest round of austerity measures., a photo by Teacher Dude's BBQ on Flickr.

Alexis Tsipras at campaign rally in Thessaloniki, Greece

Alexis Tsipras at campaign rally in Thessaloniki, Greece, a photo by Teacher Dude's BBQ on Flickr.

About 2000- 3000 people attended the election rally by The Radical Left coalition of smaller parties in Aristotelous Square in the centre of Greece's second largest city, Thessaloniki.

As support for the two largest parties, PASOK and New Democracy wanes parties on the left and right of the political spectrum are picking up votes from Greeks deeply angered by three years of austerity and economic recession.