LISBON -- Center-left Socialist Party candidate Antonio Jose Seguro declared victory in Portugal's second-round presidential election on Sunday.

According to data from Portugal's Interior Ministry, 99 percent of the ballots have been counted so far, with Seguro winning 66.7 percent of the vote and far-right Chega leader Andre Ventura securing 33.3 percent. Ventura has conceded defeat.

Outgoing President Marcelo Rebelo de Sousa announced that he had phoned Seguro to congratulate him on his electoral victory.

In a statement published on the Presidency's website, de Sousa also said that he will receive Seguro at Belem Palace on Monday afternoon.

According to the statement, de Sousa wished Seguro "every success and fulfilment for the mandate entrusted to him by the Portuguese people, which will begin on March 9," and expressed his full availability to ensure a smooth institutional transition.