"Immediately before the suicide, the person threw an explosive device into the compound of the embassy from an intersection near the sports center in Podgorica", the Montenegrin government quoted the police on its Twitter account.
A family friend, Milutin Dragicevic, said Thursday that Jaukovic was "a good patriot" during the 1999 North Atlantic Treaty Organisation air war against Yugoslavia, then comprised of Serbia and Montenegro. They say security has been beefed up around foreign embassies in Montenegro.
The man who hurled a bomb into the USA embassy compound in the capital Podgorica and then killed himself was an ex-soldier decorated by former Serbian strongman Slobodan Milosevic after NATO's bombing of Serbia and Montenegro in 1999.
The attacker was identified as Dalibor Jaukovic, a former Yugoslav Army soldier.
A USA official, demanding anonymity because he was not authorized to discuss the situation with reporters, said the attacker acted alone. The plaque appears to be personally signed by Milosevic.
On its Twitter account, the embassy said all its staff were "safe and accounted for", but it cancelled all visa services for the day, although access was available for U.S. citizens "on an emergency basis".
In 1999, 78 days of North Atlantic Treaty Organisation airstrikes on Serbia ended the war in Kosovo.
Bosnia and Herzegovina (BiH) has tightened security measures to the highest level after an explosive device was thrown at the USA embassy in Montenegro's capital Podgorica, director of BiH Directorate for Coordination of Police Bodies Mirsad Velic said Thursday.
The police blocked a section of the avenue where the embassy and the National Security Agency of the country are located and keep the area of the event cordoned off.
The blast reportedly created a small crater on the embassy grounds but inflicted no significant damage to the building and did not harm any of the staff.
Several people, including two Russian secret service operatives, are on trial in Podgorica on charges that they wanted to overthrow Montenegro's government in 2016 because of its pro-Western policies.