Clashes between pro- and anti-government supporters in Venezuela reached a fever pitch on Tuesday as both sides prepared to march in downtown Caracas, while one of the country's most prominent opposition leaders dared authorities to arrest him. Leopoldo Lopez published a YouTube video defiantly blaming President Nicolas Maduro for the violent protests last week. "I will be there showing my face," Lopez said. "I have nothing to fear." Three people were shot dead last week as students took to the streets to call for Maduro's resignation. Protestors are enraged with the country's widespread food shortage, skyrocketing inflation and crime waves. Tuesday's march comes on the heels of news that Venezuela expelled three U.S. diplomats for allegedly encouraging the demonstrations.