Security forces at Joint Base San Antonio-Lackland (JBSA) in U.S. Texas exchanged fire with suspects attempting to breach the JBSA-Chapman Training Annex early Saturday, said the military base, Paralel.Az reports citing press release from JBSA.

Security officials exchanged gunfire with the shooters around 4:30 a.m. local time (1140 GMT).

This was an off-base shooting incident since it occurred near the training annex's main gate entry, approximately three miles (4.83 km) from the JBSA-Lackland base, JBSA officials said in the release, without disclosing whether anyone was injured or how many shooters were involved.

The shooters are not known to have any military connections, it said.

The gate to the training annex was initially closed following the shooting but was reopened afterward.

JBSA officials initially called the suspects "active shooters," but San Antonio police are not categorizing this as an active shooter situation.