CARACAS, Venezuela — Venezuelan lawmakers allied with opposition leader Henrique Capriles and pro-government legislators exchanged blame for a brawl Tuesday in the nation’s congressional session.

Julio Borges, who co-founded Capriles’s Primero Justicia party, said he and several colleagues were attacked at the National Assembly after they held up a sign reading “Coup Against Parliament” to protest congressional leader Diosdado Cabello denying them the right to speak in parliamentary sessions. Borges spoke today on the Globovision network.

Cabello has also said he would withhold salaries from lawmakers who refuse to recognize Nicolas Maduro as president in the wake of April 14 elections the opposition is contesting.

“We must hold Diosdado Cabello directly responsible,” Borges, with blood on the left side of his face, said on Globovision. “You, Mr. Cabello, are digging the tomb of the whole process you call revolution.”

Several pro-government lawmakers were beaten in violence initiated by the opposition, lawmaker Odalis Monzon said on state television Tuesday. “Everyday, they are calling for violence, they’ve been doing it since April 14,” Monzon said.

A chair and other objects were thrown as lawmakers pushed each other and threw punches in a video posted on the Noticias 24 news website. The confrontation occurred in the section of the chamber occupied by the opposition.

Tomorrow, government and opposition supporters will participate in May Day marches on separate sides of Caracas. Maduro changed the route of the march he’ll lead to avoid contact with the opposition.