A man who allegedly took two sawn-off guns into the Melbourne headquarters of Australia's Border Force has been charged with numerous offences including the prohibited possession of firearms and reckless conduct endangering serious injury.

The 38-year-old man was allegedly armed with two sawn-off guns and ammunition when he was arrested on Monday.

It’s understood he walked into the building on La Trobe Street in the Docklands and began damaging a section of the building just after 1pm

He refused to leave and was arrested, police said.