A explosive device led to a search of a home in Russian Hill in San Francisco and the arrest of a man on charges of illegally possessing illegal substances.
According to U.S. Park Police spokeswoman Andrea Picavet, police arrested 46-year-old Eric Smith of San Francisco.
Officers pulled over the driver of a red pickup truck about 9 p.m. on Monday near 900 Mason Street near Crissy Field. Officers thought that there was possibly marijuana in the vehicle. Instead, the driver volunteered that he had some fireworks in the car, Picavet said.
Police originally said it appeared as though it was a stick of dynamite, and then later said it wasn't "just an average firecracker," describing it as fives times larger than a firework and possibly could be dynamite. Tests showed only that it was an active explosive.
The San Francisco bomb squad was called to detonate the dynamite at 1:15 a.m.. Two businesses - House of Air and Planet Granite - were evacuated during the process.
That led to a search of a home on Vallejo Street in San Francisco, which ended about 4 a.m. It's unclear what was inside the bags the officers took.
Smith was arrested and released. Picavet said "other charges are pending results of the investigation."