UPDATE: More details from the AP:
President Hugo Chavez won't be able to attend his scheduled swearing-in this week, Venezuela's government announced Tuesday, confirming suspicions that the leader's illness will keep him in a Cuban hospital past the key date.
National Assembly President Diosdado Cabello made the announcement during a legislative session while reading a letter from Vice President Nicolas Maduro.
Tensions between the government and opposition have been building in a constitutional dispute over whether the ailing president's swearing-in can legally be postponed. The president underwent his fourth cancer-related surgery in Cuba last month and hasn't spoken publicly in a month.
Opposition leader Henrique Capriles said earlier Tuesday that the Supreme Court should rule in the disagreement between the opposition and Chavez's government. He said the constitution is clear that the current presidential term ends on Jan. 10.