SAN ANTONIO – Updated at 4 p.m.:

While searching for the shooter's vehicle, several pickup trucks fitting the vague description were located in various parking lots surrounding the shops at La Cantera.

Two vehicles were checked out and one citizen was question and released, police senior public information officer Sandra Pickell said.

Updated at 12:40 p.m.:

Police spokesman Officer Doug Greene said that one shell casing was found on an Interstate 10 east access road near La Cantera Parkway outside of the Eilan Apartments.

"The shooter was seen allegedly shooting at his own vehicle then fleeing onto La Cantera. There were other locations where the shooter was allegedly seen shooting but no shell casings were located. The investigation is still ongoing," Greene said.

Updated at 12:25 p.m.:

San Antonio police have cleared the scene at La Cantera and said they found shell casings at two locations.

"At this point, we have no victims. We have no vehicles," police spokesman Officer Doug Greene said. "No one has called to say that they're vehicle has been struck by any gunfire. We did locate some shell casings. I can't confirm the specific locations of those shell casings, but (they were located) here in the vicinity."

Original Story:

San Antonio police spokesman Officer Doug Greene confirmed that police received reports Thursday morning of a gunman who appeared to be shooting at passing vehicles in the La Cantera Parkway and Interstate 10 area.

Some witnesses said that the gunman was in a vehicle. Others said he was on foot, Greene said. So far, there have no reports of victim or damage.

The reports prompted police to ban traffic at La Cantera Parkway and I-10, but it has since reopened.

The San Antonio Police Department, Northside Independent School District and UTSA police departments are in the area.

As a precaution, three NISD schools have been placed on a modified lockdown, district spokesman Barry Perez said. The schools include May, Ellison and Leon Springs elementary. Exterior entrances are secured but activity inside the campuses are normal, Perez said. Texas Military Institute was also placed on modified lockdown.

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