Palo Alto's Main Post Office has two large broken windows after a vandal or vandals threw a large object into them, a U.S. Post Office spokesman said.

Someone broke the windows to the lobby of the building at 2085 East Bayshore Road on Thursday, March 23 at 1:15 a.m., spokesman Gus Ruiz said.

Employees reported the incident to Palo Alto police at 8:25 a.m., according to a police log. The postmaster notified the U.S. Postal Inspection Service and the postal facilities service office the same day, Ruiz said.

A contractor has installed plywood to cover two areas of damage that are accessible to the public. Damage near the top of one of the windows near the eaves was not accessible and remained uncovered.

Palo Alto police Sgt. David Lee said that video at the building did not capture the vandalism. Large pieces of scrap metal were used to break the windows, but nothing was taken. The damage is estimated at $3,000, he said.

Ruiz said the windows would remain covered by plywood in the interim because the glass type is a special order and the window is not a normal size.

Anyone with information regarding the vandalism is asked to call the Palo Alto Police Department at 650-329-2413.