FILE - In this June 5, 2012 file File: Carl DeMaio (AP Photo/Gregory Bull, File)

The San Diego campaign office of Republican U.S. House candidate Carl DeMaio was vandalized this week, an act his campaign says wasn't random.

On Wednesday morning, DeMaio campaign staffers arrived at the office and observed damage to computers, phone and other equipment. They reported the findings to authorities.

"It is clear this was no random act of vandalism, and we are extremely disappointed that someone would do this just days before an election," said DeMaio campaign spokesman Dave McCulloch. "This type of behavior has no place in politics."

The campaign did not immediately suggest a specific motive. It said the vandals apparently poured water onto laptops, cut phone cables and smashed monitors, among other things. The local police department is looking into the matter.

"Our energetic team was not deterred — and instead of making phone calls, our volunteers went out walking neighborhoods in San Diego, Coronado, and Poway and continuing to deliver Carl’s positive message of reform. We appreciate the professional work done by the San Diego Police Department to investigate the incident," said McCulloch.

DeMaio tweeted a picture of some campaign aides late Wednesday along with the message, "This morning, our campaign office was highly vandalized. But we're back -- and won't miss a beat."

The reported break-in comes just days ahead of the June 3 all-party primary in California's 52nd district. DeMaio is expected to advance to a general election showdown against Rep. Scott Peters, one of House Democrats' most vulnerable members.

A top Republican recruit and former city councilman, DeMaio is one of three openly gay Republicans running for Congress this year.