San Diego Police and firefighters were called to a Mission Bay hotel parking lot to investigate a suspicious device Monday.
Officers arrived to the Hilton Mission Bay located on East Mission Bay Drive just after 10 a.m.
A witness called 911 to report seeing a man put the object under an employee's car in the parking lot.
Officials taped off the area to traffic and called in the bomb squad.
The bomb squad used a robot to determine there was nothing dangerous inside.
Authorities gave the all-clear a couple of hours later, and the area was reopened.
