A passenger who tried to force his way into the cockpit of a United Airlines plane has been detained after the co-pilot hit him on the head with an axe.

OJ Simpson today denied he was involved in drugs or money-laundering after a dawn raid by police investigating an ecstasy ring.

US investigators have found no further sign of anthrax in the office of a man killed by the disease since traces were found on his computer keyboard and in the nose of a co-worker, health officials said.