The official said today that Cpl Francisco Javier Soria Toledo was accidentally killed by Israeli artillery following a Hezbollah attack that killed two Israeli soldiers.
The official says Israel did not intend to harm UN forces. She spoke on condition of anonymity because she was not authorized to talk to reporters.
After the incident, Spain's UN ambassador blamed Israel and the UN Security Council condemned the killing. A UN diplomat said Israel apologised to Spain, but Israel had not publicly admitted responsibility.