Bogota: A video has been released that shows Colombian President Juan Manuel Santos wetting himself during a speech on the campaign trail.

President Santos was addressing a crowd in the city of Barranquilla when a small wet patch appeared on the front of his beige trousers.

Forgot to go to the loo: Colombian President Juan Manuel Santos (circled) was ridiculed after the video of him wetting his pants went viral. He continued his speech oblivious to his wet pants.

As the speech continues the patch seems to get bigger.

The address was filmed by a person in the crowd and quickly uploaded to YouTube, where President Santos drew the ridicule of his countrymen.

Juan Manuel Santos was elected president in 2010

The 62-year-old, who is not known to have any illness, continued with his speech, apparently oblivious to his damp trousers. But as he continues his address in the coastal city of Barranquilla, the wet patch increases in size.

Santos was elected president in 2010 and has since made his name as a peacemaker, stepping in to solve a political crisis in Venezuela as well as seeking an end to Colombia’s own civil war.

Nearly 300,000 people have watched the clip of a wet patch appearing at the front of Juan Manuel Santos’s trousers.