The two men who showed up at the Tom Knox campaign office in the Northeast Tuesday didn't seem out of place, what with their "Tom Knox for Philadelphia" T-shirts and all.

But it was larceny, not elections, that they had on their mind.

The pair followed a campaign worker carrying a cash bag to a back room at the office on Frankford Avenue near Cottman Avenue and stole the bag at gunpoint before running off, police said.

The bag contained $350, said Josh Morrow, Knox's campaign manager. The money was to be used for gas for get-out-the vote vans, officials said.

Police speculated the robbers may have been looking for a bigger haul: the thousands the campaign planned to dole out to primary workers for their labors on behalf of the multimillionaire businessman.

Contact staff writer Joseph A. Gambardello at 215-854-2153 or jgambardello@phillynews.com.