An International Monetary Fund (IMF) employee was injured on her arms and face on Thursday when a letter bomb posted to the world lender’s Paris office blew up as she opened it, police said.
The explosion was caused by a “fairly homemade” device, the French capital’s police chief, Michel Cadot, told reporters.
Cadot said there had been recent telephone threats, but that it was not clear whether these were linked to the incident at the IMF’s offices.
A police source said the woman who opened the letter suffered burns on her face and arms but that her life was not in danger.
Separately, at least two people were injured in a shooting at a high school in the small southern French town of Grasse, a police source said.
France, which is in the middle of a presidential campaign ahead of elections in six weeks’ time, has been hit by attacks by Islamist groups in the past few years that have killed scores of people. The country is still in a state of emergency with army units on patrol in Paris.
A militant Greek group, Conspiracy of Fire Cells, claimed responsibility for a parcel bomb mailed to German finance minister Wolfgang Schäuble on Wednesday, but there was no immediate claim of responsibility for the Parisbomb.
The IMF has been involved in discussions between Greece and its international creditors on disbursing new loans to Athens under a bailout programme.
The French president, François Hollande, said French authorities would do all they could to find those responsible.
The IMF managing director, Christine Lagarde, condemned the explosion as “a cowardly act of violence”.