SAN DIEGO (CBS 8) - On Monday, three Saudi nationals were turned over to Homeland Security at North Island Naval Air Station.

According to a spokesman for the Navy, it happened Monday afternoon after the three men approached the Stockdale gate in a car and were detained when they were not able to produce proper identification.

The encounter was not characterized as hostile.

Then names of the three men have not been released and it is unknown if they are still in custody.

The current threat level at military installations across the country stands at Bravo in response to the threat of ISIS inspired attacks.