Heather Nauert, a spokesman for the American State Department also took to Twitter to address the incident, saying that the embassy "confirms there was a small explosion near the U.S. Embassy compound at approximately midnight local time on February 22".
Montenegro and worldwide media reported that the man behind the attack was 43-year-old Dalibor Jaukovic, who was identified by a close relative.
The US mission in Podgorica, the capital of Montenegro, has urged people to avoid the area following a grenade attack on the diplomatic premises by an unknown assailant, who subsequently blew himself up with a second device. The attacker then "committed suicide with an explosive device". They said security was beefed up around all foreign embassies in Montenegro.
It happened around midnight in the capital Podgorica. But as yet Jaukovic's motives remain unknown.
"Immediately before, the person threw an explosive device from the intersection near the Sport Center into the US Embassy compound", the Government of Montenegro tweeted.
Photos posted on Jaukovic's Facebook profile include a plaque honouring his contribution in the fight against North Atlantic Treaty Organisation during the bombing.
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GM owns 77 percent of its South Korean unit GM Korea, while state-run Korea Development Bank (KDB) owns a 17 percent stake. The trade minister also stated that taxpayers' money would not be wasted in government efforts associated to the GM issue.
Jaukovic wrote "No to NATO" in a May 2017 Facebook post.
The small Balkan country is in the process of tightening cooperation with the U.S.as it became the newest North Atlantic Treaty Organisation ally a year ago.
'Avoid the embassy until further notice.' No one else was hurt and there was no major damage. However, based on current reports it is unclear whether two explosive devices were thrown or whether the attacker died after hurling one.
Montenegro has strengthened western ties since splitting from Serbia in 2006, and the USA embassy opened in Podgorica the same year. The blast killed the man but did not injure anyone in the embassy, which was closed for the night.
According to the report, the U.S. established diplomatic ties with the tiny Balkan state in 2006 after it split from much larger Serbia.