A U.S. Secret Service employee's agency-issued laptop computer was stolen in New York, a Secret Service spokeswoman confirmed in a statement.
An investigation is ongoing.
It's unclear what information was on the laptop, but spokeswoman Cathy Milhoan said agency-issued laptops "contain multiple layers of security including full disk encryption and are not permitted to contain classified information."
Some news outlets have reported the laptop contained sensitive information, including floor plans for Trump Tower and information about the investigation into Hillary Clinton's private email server. NPR has not confirmed this.
The Secret Service is asking anyone with information about the crime to contact the New York Police Department and the Secret Service in New York.
Meanwhile, the service also said that it took nearly 17 minutes to capture a man who jumped the White House fence last Friday night.
The suspect, identified as 26-year-old Jonathan Tran, first scaled an outer perimeter fence near the Treasury building, then climbed over an 8-foot vehicle gate and a 3 1/2-foot fence near the East Wing of the White House before being captured.
The statement says the "men and women of the Secret Service are extremely disappointed and angry" about the incident and that steps have been taken to "mitigate lapses in security protocols."