How you can help Mexico earthquake victims

Lindbergh Field steps up security after Fort Lauderdale shooting

SAN DIEGO -- Officials at Lindbergh Field announced heightened security staffing following Friday morning's deadly mass shooting at Fort Lauderdale-Hollywood International Airport in Florida.

Read More: What we know about the Fort Lauderdale airport shooting suspect

"This increased presence is not in response to any specific threat to the airport or San Diego," said Rebecca Bloomfield, a spokeswoman for San Diego International Airport. "It is simply an abundance of caution to ensure the safety and security of travelers."

Read More: At least 5 dead, 8 injured in shooting at Fort Lauderdale Airport

A lone shooter opened fire shortly before 10 a.m. Pacific time at a baggage-claim area inside the East Coast airport, killing at least five people and wounding as many as nine others, according to news reports.

Following the deadly rampage, the alleged gunman, identified as 26-year-old Esteban Santiago, laid down and silently waited to be taken in by authorities, CNN reported.

The motive for the killings was unknown.

Read More: Can you check firearms on a plane flight?