The White House went under lockdown Thursday afternoon after two suspects reportedly threw objects over the north and south fences.

“An individual threw something over the north fence line and another individual threw something over the south fence line,” U.S. Secret Service spokesman Ed Donovan told the Washington Post. “They’re both in custody and we’re working to clear those items now.”

Donovan said both objects were thrown around 2:52 p.m. EDT. The president was not in the White House or the D.C. area at the time. President Obama is in California to appear at fundraisers in California, the Post reported.

The Secret Service is still trying to identify the objects and determine if they are dangerous or not.

The incident prompted the second lockdown at the White House this week. A lockdown went into effect around 4:30 p.m. EDT Tuesday after a Honda Civic followed a motorcade carrying the president’s daughters too closely through the Pennsylvania Avenue entrance, NBC reported.

California Security