Gunfire was reported at Joint Base San Antonio-Lackland between security guards and the passing vehicle

U.S. Air Force security guards exchanged gunfire with someone who opened fire twice at the entrance to Joint Base San Antonio-Lackland early Saturday, according to a base spokesman.

“There was an off-base shot from a passing vehicle that fired shots toward the gate, prompting our security forces to respond,” base spokeswoman Stefanie Antosh said in a statement. “There is no threat to the installation. We had no injuries, no deaths.”

Antosh said the shooting was being investigated by San Antonio police, who said in a statement that the first shooting happened around 2:15 a.m.

“Security personnel stated that they heard multiple shots fired as well as rounds being fired past them,” Sgt. Washington Moscoso said in the statement. “Following this incident, security personnel have added more armed guards as a precaution.”

A vehicle later pulled up near the same entrance shortly after 4:30 a.m., Moscoso said.

“For the second time, shots were fired at Air Force security personnel, however, with additional security personnel present, multiple Air Force personnel returned fire at the suspect vehicle,” Moscoso said.

The vehicle then fled. No injuries were reported and the shooting remains under investigation, Moscoso said.

It was not known how many rounds were fired, how many shooters there were or what their motive was, according to Antosh.

The entrance was closed for several hours after the shooting before being reopened around 9:30 a.m., but the base was not locked down, according to Antosh.

In addition to Lackland, Joint Base San Antonio includes Randolph Air Force Base and the Army’s Fort Sam Houston and Camp Bullis training camp.

Lackland is home to more than 24,000 active duty members and 10,000 civilians of the Department of Defense, according to the base’s website. Includes 37th Training Wing; 149th Fighter Wing; 59th Medical Wing; Air Force Intelligence, Surveillance and Reconnaissance Agency; Air Force 24th Wing, 67th Network Warfare Wing; Group of Cryptological Systems; National Security Agency; and 70 associated units.