The man who attacked the US embassy in Montenegro on Wednesday was a Yugoslav army veteran, police say.
The assailant threw a grenade into the compound in the capital Podgorica at about midnight (23:00 GMT), before killing himself.
Authorities identified the attacker by his initials, DJ, but did not name him.
Police say the man had no previous criminal convictions, and they still have not found a motive. No-one else was injured in the attack.
The authorities are investigating whether more people were involved.