CARACAS  - Venezuela’s ailing President Hugo Chavez has been undergoing “tougher” new treatment for cancer including chemotherapy at the military hospital where he has been for the last two weeks, his vice-president said. Speaking late on Friday after a Catholic Mass to pray for Chavez’s health, Maduro described how the socialist president had personally given the order to leave Cuba in mid-February, two months after his latest cancer surgery there. “He said ‘I’ve taken the decision to return to Venezuela, I’m going to enter a new phase of complementary treatments, tougher and more intense, I want to be in Caracas,” Maduro said. “Do you know what the complementary treatments are? They are the chemotherapies applied to patients after operations,” he added outside a chapel in the Caracas military hospital. Apart from one set of photos showing Chavez in a Havana hospital bed, he has not been seen nor heard from in public since December 11 surgery in Cuba, his fourth operation since the disease was detected in mid-2011.