The man shot by an FBI agent along the 3300 block of Tantalus Drive today allegedly posed as a police officer at the University of Hawaii last week, triggering a campus-wide security alert.

The FBI agent was on "personal time" and not involved in an investigation when the shooting occurred at Tantalus Lookout around 1:15 p.m. today, FBI agent Tom Simon said.

The man who was shot was taken to the Queen's Medical Center in critical condition. He was described as being in his 30s.

The unidentified agent was uninjured, Simon said.

UH spokesman Gregg Takayama said the man who was shot today allegedly posed as a police officer on campus May 1 and 2, triggering a campus-wide security alert.

The man claimed to be a Honolulu police officer at the Maile Way entrance gate, Takayama said.

He wore a jacket bearing the word "police" and had a fake identity badge. He was driving a white Ford pickup truck.

After today's shooting at the Tantalus Lookout, police towed a white, Ford pickup truck that had a lawnmower in the back and the name "Pioneer Martin Pacific" on the side.

The truck had a shattered front windshield.

The investigation into the shooting disrupted Mother's Day traffic into and out of scenic Tantalus Drive until police reopened Tantalus Drive at 5:05 p.m.

On the night of July 6, 2006, taxi driver Manh Nguyen and two bystanders, Jason and Colleen Takamori, were shot to death at Tantulus Lookout.

Their accused killer, Adam Mau-Goffredo, also was accused of robbing a home nearby following the shootings.

Mau-Goffredo was later ruled mentally unfit to stand trial and is being held at the Hawaii State Hospital.