The Stalinist regime also declared that it was severing a military hotline with South Korea – the third link to be cut in as many weeks. The hotline is used to communicate as hundreds of workers travel back and forth at an industrial complex jointly established as a showcase of cooperation between the North and the South. Officials estimated that more than 900 South Korean workers were in the Kaesong plant at the time of the announcement. It was not clear that any restrictions on their movements had been imposed.