A female employee of the International Monetary Fund was injured in the face and arms on Thursday, when a letter bomb blew up as she opened it, police said. The explosion was caused by a homemade device, said the head of the French capital's police force Michel Cadot. Cadot said there had been some recent telephone threats but it was not clear if these were linked to the incident at the IMF's offices. Christine Lagarde, the head of the IMF, condemned the explosion, saying it was a “cowardly act of violence.”