EL ALTO, Bolivia — Bolivia’s congress on Wednesday scrambled to find a way to call new elections, hoping to chart a path out of the turmoil gripping the country a day after the military opened fire on protesters blocking fuel and food from reaching La Paz, the nation’s main city.

Eight people were killed, a human rights official said, in the clashes outside a major fuel depot in El Alto, a working-class city in the mountains outside La Paz that had been blockaded for days by supporters of the ousted president, Evo Morales.

Mr. Morales was driven from office earlier this month after 14 years in office, following a disputed election in which he claimed to be the winner. He fled the country and took asylum in Mexico, having lost the allegiance of the military and police.

But Mr. Morales, the country’s first Indigenous president, still has legions of supporters among the country’s Indigenous groups and among rural coca growers, who have taken to the streets to call for his return.