BOGOTA - Colombian President Juan Manuel Santos said on Monday that he would undergo surgery for prostate cancer this week but that the tumor was minor and non-aggressive.

"It's a small tumor located on the prostrate gland and it's a good prognosis, it's not aggressive," the 61-year-old president said in an address to the nation from the presidential palace in Bogota, flanked by his doctor and his wife.

Santos, who took office two years ago and has just begun negotiations with Colombia's FARC guerrillas, said he would undergo surgery on Wednesday.

"I am going to stay in the clinic a few days. I will be subject to a few physical limitations, but I will continue exercising my functions as President of the Republic," he said.

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