The first explosion, which occurred at midday (11amGMT) seriously injured a caretaker at the Swiss embassy.
The second, which occurred at around 2.30pm (1.30pm GMT), was at the Chilean embassy, also injuring one person.
The Rome prosecutor’s office has opened an investigation on suspicion of “an attack with terrorist aims,” ANSA news agency reported
One of the investigators said that one of the main lines of inquiry was on “anarchist circles of the eco-terrorist movement.”
Another possibility mentioned by investigators is that “the attack was organised by insurgent anarchist groups.”