The circumstances of this brutal attack are still unclear and no effort will be spared to shed light on what happened

The Italian ambassador, Luca Attanasio, 43, was hit in the abdomen and died several hours later at the U.N. hospital in the regional capital Goma

Italy's envoy to Congo killed in attack on U.N. convoy

Attanasio's death was confirmed in Rome by the Italian foreign ministry, which also said an Italian policeman died