Venezuelan President Hugo Chvez arrived in Cuba Saturday night for a fourth round of cancer treatment, the Communist island's state press reports. 

CubaDebate, a government-run news website, published photos of Chvez's arrival. He was accompanied by his daughter Rosa Virginia and both were greeted by Cuban Vice President Jos Ramn Machado Ventura. 

Chvez has traveled to Cuba three times since beginning radiation therapy in March for trips of up to five days, but he said on Friday his stay in Cuba will be longer this time.

"Since we're going to enter the second and last phase of treatment, and that treatment is rough ... I'm thinking of asking for permission not to return in the middle of the week next week, but rather stay in Cuba all of this next week to receive the complete treatment and not have to be going and coming," he said.

The news comes as Chvez made a last-minute decision Saturday to forgo an appearance at the Summit of the Americas in Cartagena, Colombia, citing medical issues.