Coach K passes mentor, colleague, friend on historic night at MSG

Washington (CNN) -- A bullet-proof window stopped a bullet at the White House, the Secret Service said Wednesday.

Authorities are investigating whether the bullet and another round found on the exterior of the White House are connected to shots fired nearby last Friday.

The damage to an exterior window was discovered Wednesday morning, the Secret Service said in a statement.

"A round was stopped by ballistic glass behind the historic exterior glass. One additional round has been found on the exterior of the White House. This damage has not been conclusively connected to Friday's incident, and an assessment of the exterior of the White House is ongoing."

There is no specific concern for President Barack Obama's safety, a Secret Service official not authorized to speak on the record told CNN. The bullets were found Wednesday on the south side of the White House, the Secret Service official speaking on condition of anonymity told CNN.

Last Friday night at about 9 p.m., U.S. Park Police and the Secret Service investigated after hearing shots fired about 700 to 800 yards from the White House, the Secret Service statement said.

Within five minutes, officers located a vehicle in the 2300 block of Constitution Avenue.  Evidence in the vehicle led to U.S. Park Police obtaining an arrest warrant for Oscar Ortega-Hernandez," described as a 21-year-old Hispanic male, 5 feet 11 inches tall and weighing 160 pounds.

A weapon registered to Ortega-Hernandez was found in the car, according to a law enforcement source familiar with the investigation.

The Secret Service interviewed people who know Ortega-Hernandez, and determined he had a "direction of interest toward the president and the White House" -- a term that does not suggest a direct specific threat.

Authorities are searching for Ortega-Hernandez, with the FBI, ATF and Metropolitan Police Department all taking part, officials said.

"There's always an outer perimeter and this was on the very outer perimeter of our security," the Secret Service official said. "The gun and car were found within several minutes. We have a lot of security -- a lot of layered security down there and the security worked."

The law enforcement official familiar with the investigation said when shots were heard Friday night, there were reports of tires screeching and cars racing.

By the CNN Wire Staff

CNN's Carol Cratty, Athena Jones and John King contributed to this report.