A schoolboy is facing charges after he confessed to throwing a piece of wood at Donald Trump’s motorcade, police authorities said.

Secret services launched an investigation after a “hard object” hit one of the vehicles in the US President’s motorcade as his convoy was greeted by protesters when making its way to his Mar-a-Lago resort in Florida.

The Palm Beach police, which is working with the secret services in the investigation, said the boy was from a local middle school and that he implicated four other students.

The Presidential limo was not hit by the piece of wood and no-one was injured.

“Immediately after completing the motorcade movement several members of the motorcade returned to the scene and began canvassing the area looking for witnesses and any small hard objects along the roadway in that area,” Palm Beach police said in a statement.