Colombian presidential candidates conclude their campaigns in front of massive crowds.

Colombian presidential candidates concluded their campaigns on Sunday with large public rallies across the country, just days before the first round scheduled for May 31.

The campaign is ending in a highly polarized climate, marked by intense debates on security, the economy and social inequalities, while analysts expect a close battle that could extend into the second round on June 21.

Left-wing candidate Ivan Cepeda, a leading figure in the Historic Pact, appeared slightly ahead in the last poll published before the election. However, this survey indicated that he could be defeated in a runoff against one of his right-wing opponents, whereas previous polls had predicted his victory.

At his final rally in Bogota, Cepeda called for "profound change" in the country, promising social reforms, a reduction in inequality and the continuation of peace policies.

His right-wing opponents, for their part, have focused their campaign on security issues, accusing the left of weakness in the face of armed groups and drug trafficking.

The presidential election is being closely watched in Latin America, as Colombia is a strategic ally of the United States in the region and a key player in the fight against drug trafficking.

Colombian authorities have announced a major security deployment for the election, following reports of several violent incidents and threats against political figures during the campaign.