CARACAS, Venezuela (AP) — A minority group of opposition parties in Venezuela agreed Monday to enter negotiations with President Nicolas Maduro’s government without the participation of U.S.-backed opposition leader Juan Guaidó, eroding his efforts to hold together a coalition to confront the socialist administration. The agreement was signed by representatives of several opposition parties alongside Maduro’s top aides in a nationally televised event attended by foreign diplomats. It marks the first significant split in the anti-Maduro camp since Guaidó, as head of the opposition-controlled congress, declared himself interim president in January, citing what was seen as Maduro’s fraudulent re-election last year.