As word quickly spread Thursday that four bombs in London had killed nearly 40 people and injured hundreds, local and state officials learned that domestic terror alerts had increased.
For most area law enforcement officers, it was another day of work. After being told that the nation's transportation system was on "orange alert," employees went on with their regular duties.
A few, including a railroad police officer who was spotted at the Lodi Depot on Sacramento Street, increased their visual presence.
In other parts of the state, however, security was a bigger concern than in Lodi.
Undercover police and transit employees were deployed in the San Francisco Bay Area, Sacramento and San Diego, said Kelly Huston, spokesman for the Governor's Office of Homeland Security. Even the LAPD's bomb squad was activated.
Locally, officers continued to go about their normal calls ranging from stolen cars to restraining order violations and buses continued to pick up passengers.
City buses were not considered to be in any danger, Transportation Manager Tiffani Fink said, and county officials reported nothing out of the ordinary.
"Aside from the heightened threat level for mass transportation, we're just making sure everyone's aware," said Mike Cockrell, assistant coordinator for San Joaquin County's Office of Emergency Services.
He was out running early Thursday morning, returned home to turn on the TV, and learned that four bombs had exploded in London. Cockrell's office soon contacted local law enforcement and fire dispatchers, as well as other large agencies such as gas and telephone companies.
Information about the heightened alert was passed through teletype and e-mail to law enforcement, and it was also placed on the office's Web site, Cockrell said. Then, for the most part, it was back to business as normal. There was no need to open the command center reserved for large emergencies, Cockrell said.
Lodi Police did not call in extra officers, though all employees were told about the alert through e-mail and in daily shift briefings, Sgt. Bill Alexander said. The department does occasionally get terror alerts, and those are passed on to officers, Chief Jerry Adams said.
The Sheriff's Department also told deputies about the alert, though nothing changed, said spokesman Les Garcia. Like other spokespeople, he asked the public to report anything suspicious to local authorities.
"We've had an ongoing high level of sensitivity across our rail network, and we encourage our employees and customers to remain vigilant," said Lena Kent, spokeswoman for BNSF Railway, formerly known as Burlington Northern-Santa Fe.
She declined to comment on how security was being increased.
Amtrak officials, in a written statement, said more officers and K-9 teams were deployed but that there was no indication the trains -- some of which run through Lodi -- were in any danger.
Rapid transit customers faced no train cancellations, though Bay Area Rapid Transit spokesman Jim Allison said officials had closed bathrooms in all the stations. The system serves about 300,000 commuters daily in the region.
Allison said there was no reason to believe BART would be targeted, and the measures were precautionary.
Altamont Commuter Express trains, which run through Stockton, were running normally, according to the ACE Web site.
At least a dozen armed transit police patrolled San Francisco's Caltrain station, a busy hub for travel to San Jose. Several had bomb-sniffing dogs.
In San Francisco, Pete Howes, a spokesman for San Francisco's Office of Emergency Services, said Fire Department units had been deployed throughout the city's transportation systems. Each BART train, MUNI bus and cable car was fully cleared at the end of each run, he said.
Locally, Woodbridge fire crews went about their normal business, though they have gear designed to help combat terrorism if needed. Chief Michael Kirkle said he was never even told about the orange alert for transportation.
Throughout the state, 29 California Highway Patrol aircraft continued routine patrols for problems along bridges, rail lines, aqueducts, pipelines and roadways, California Highway Patrol Commissioner Michael Brown said.
"We're getting as many birds in the air as we can staff," he said.
The Associated Press contributed to this report.
Contact reporter Layla Bohm at email@example.com.