(Shebapost): Colombian runner Diego Palomeque has been temporarily banned from the London Olympics after failing a drugs test.

The 18-year-old did not take part in the men's 400m heats after a urine sample that he provided in London on 26 July tested positive for testosterone.

The International Olympic Committee said they would wait until the results of a 'B' sample before taking further action.

Palomeque faces a possible two-year suspension as a first-time offender.