Federal authorities are leading an investigation into a bomb that was attached under a Tucson man's vehicle in the parking lot of a Hooters in Marana.
"The bomb components will be analyzed to make a determination of construction and explosive filler," said Tom Mangan, an Alcohol, Tobacco, Firearms and Explosives spokesman based in Phoenix.
Investigators will also analyze the components in search of DNA, Mangan said.
The explosive device was sent to the agency's regional laboratory outside San Francisco, Mangan said.
The bomb was found Sunday by the victim as it was hanging under his SUV after he left Hooters, 4385 W. Ina Road, authorities said. It was reported to the Marana Police Department shortly after 4 p.m.
Marana police secured the area and called in the Pima County Regional Bomb Squad, which neutralized the bomb, Mangan said.
"The procedure was executed flawlessly by the bomb squad," Mangan said.
ATF also was called to the scene, which was cleared and secured until 1 a.m. Monday.
The victim works for a construction company, Mangan said. He would not give further details about the man.
"The motive, placement of the device was to target the individual who owned that vehicle. It could have killed the intended victim, and seriously injured or killed innocent victims," Mangan said.