SAN DIEGO -- A San Diego police officer was under investigation Monday in connection with an off-duty shooting that wounded a woman and her 8-year-old son in Oceanside, officials said.

Franklin White, an SDPD patrolman since autumn 2005, was placed on administrative leave following Saturday night's shooting, which may have stemmed from a road-rage incident, according to Oceanside police.

White, 28, was not arrested, SDPD Chief William Lansdowne said.

"It's Oceanside's case, and they're going to handle the criminal side of it," he said. "We'll handle any (personnel) issues."

The shooting apparently resulted from an escalating dispute that erupted about 9:15 p.m. between White and another motorist near a home-improvement store in the 100 block of Old Grove Road, authorities reported.

"One of the parties violated the right-of-way of the other party, and that (resulted in) the road-rage incident, which led it into the (Lowe's) parking lot," said Oceanside police Sgt. Kelan Poorman. "Then there was some type of either verbal or physical altercation that ... led to the gunfire."

Medics airlifted the wounded woman to Sharp Memorial Hospital and took her son to Rady Children's Hospital. Their wounds were not considered life-threatening, Poorman said.

White works out of the SDPD's Southeastern Division, said Detective Gary Hassen, a spokesman for the department.