Athletics' ruling body will send a warning to Jon Drummond for disrupting this year's world championships but will take no further action against the American sprinter.

The International Association of Athletics Federation (IAAF), holding a council meeting in Berlin, said on Saturday that it would send a "serious formal warning" both to Drummond for his conduct and to the American federation, USTAF.

Drummond halted competition for nearly an hour in Paris when he refused to leave the track after being disqualified for a false start in the second round of the showcase men's 100 metres.

The IAAF said on Saturday that American team official Michael Caine, who encouraged Drummond to protest, would not be given accreditation for IAAF events for three years.

The ruling body say it had appreciated USTAF's decision to address the behaviour of American athletes and team officials at major events.

Drummond, now 35, lay on the track, argued with officials and attempted to return to his blocks in scenes unprecedented in either a world championships or an Olympic Games.

The sprinter withdrew from the world championships two days after staging his protest and was then officially disqualified by the IAAF.