The State Department revealed Wednesday that the shooter accused of opening fire on the U.S. Embassy in Lebanon earlier today was wearing what "appeared to be an ISIS insignia." 

Spokesman Matthew Miller said "one member of the embassy’s local guard force was seriously injured" and the gunman has been arrested following the attack in Beirut that unfolded around 8:30 a.m. local time. 

"We are aware that the individual who was arrested was wearing what appeared to be an ISIS insignia, but we are conducting a full investigation with the Lebanese authorities into the actual motivations," Miller said during a press briefing. 

The embassy said in its own statement that "small arms fire was reported in the vicinity of the entrance to the U.S. Embassy" and "Thanks to the quick reaction of host country security forces and our Embassy security team, our facility and our team are safe." 

ATTACK ON US EMBASSY IN LEBANON FOILED, GUNMAN CAPTURED AFTER SHOOTOUT 

Lebanese special forces

Lebanese special forces sit in their vehicles as they patrol on a road that leads to the U.S. Embassy in Aukar, a northern suburb of Beirut, Lebanon, on Wednesday, June 5. (AP/Bilal Hussein)

"The Embassy will remain closed to the public for the rest of today, June 5, but plans to be open for general business as usual tomorrow, June 6," it added. 

NETANYAHU SAYS ISRAEL ‘PREPARED FOR VERY INTENSE ACTION’ AGAINST IRAN-BACK HEZBOLLAH AMID RISING TENSIONS 

US Embassy in Lebanon

A general view of a part of the U.S. Embassy compound in Aukar, a northern suburb of Beirut, Lebanon, on Wednesday, June 5. (AP/Bilal Hussein)

The embassy recommended U.S. citizens in Lebanon monitor Travel.State.Gov  "for alerts and the news closely for breaking developments that could affect internal security.

"As advised in the Lebanon Travel Advisory, U.S. citizens should avoid travel to the Lebanon-Israel border area, the Lebanon-Syria border area, and refugee settlements," it also said. "In all parts of Lebanon, you should avoid demonstrations and exercise caution if in the vicinity of any large gatherings or protests." 

Lebanese security stand guard

Lebanese security stands guard on a road that leads to the U.S. Embassy. (AP)

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The shooting comes following repeated cross-border skirmishes between America’s ally Israel and the Lebanese terrorist group Hezbollah. 

Fox News’ Landon Mion and Danielle Wallace contributed to this report.