Moreno said the military would enforce a round the clock curfew in Quito and around critical infrastructure like power stations and hospitals in response to violence in areas previously untouched by the protests. Around 1 p.m., masked protesters broke into the national auditor's office and set it ablaze, sending black smoke billowing across the central Quito park and cultural complex that have been the epicenter of the protests.
About two hours later, a group of several dozen masked men swarmed the offices of the private Teleamazonas television station in northern Quito, set fires on the grounds and tried to break into the building where about 20 employees were trapped.
"They're trying to enter the station, trying to break down the doors, we're asking for help but the police aren't coming," one employee told The Associated Press by telephone on condition of anonymity because he was afraid of retaliation.
A journalist with the newspaper El Comercio told the AP that the paper's offices in southern Quito were also under attack. The building's security guards were seized and tied up and attackers were trying to break into offices where journalists were hiding, the journalist said, also under condition of anonymity for fear of retaliation.
Journalists later reported that police had arrived and stopped the attacks.
Moreno appeared on national television alongside his vice president and defense minister to announce that he was ordering people indoors and the army onto the streets.
He blamed the violence on drug traffickers, organized crime and followers of former President Rafael Correa, who has denied allegations he is trying to topple Moreno's government.
Moreno served Correa as vice president before he become president and the two men went through a bitter split as Moreno pushed to curb public debt amassed on Correa's watch.
Moreno said the masked protesters had nothing to do with the thousands of indigenous Ecuadorians who have protested for nearly a week over a sudden rise in fuel prices as part of an International Monetary Fund-backed austerity package.
"I have ordered the Armed Forces Joint Command to immediately undertake all the necessary measures and operations," Moreno said. "We are going to restore order in all of Ecuador."
The violence, curfew and military deployment came shortly after the announcement of a possible softening of Ecuador's 10-day standoff. Indigenous leaders of the fuel price protests that have paralyzed Ecuador's economy for days said early Saturday afternoon that they were willing to negotiate with Moreno over the austerity package.
The Confederation of Indigenous Nations of Ecuador said on Twitter that "we have decided to participate in direct dialogue" with Moreno.
Minutes later, Leonidas Iza, a Quechua leader from mountainous Cotopaxi province, told Ecuavisa television that "we have asked for minimal conditions for dialogue," including what he called an end to government violence against protesters.
Previously, indigenous protesters had refused to negotiate until Moreno restored fuel subsidies.
Quito Mayor Jorge Yunda said Moreno was willing to revise the package and planned to meet Saturday with leaders of the demonstrations. Yunda said he and other mayors were mediating the standoff that has halted Ecuador's oil production, blocked highways and caused hundreds of millions of dollars in loss to industries such as flower-growing to dairy farming.
As the two sides made progress toward compromise, violence was spreading.
Across the capital, hooded men used rocks and burning tires to block streets in residential neighborhoods. Some drivers, pedestrians and owners of small businesses reported being threatened and robbed. Roads leading to the international airport were blocked, according to city officials.
The indigenous leaders distanced themselves from the violent gangs, calling them instigators unconnected to the native groups' cause.
Interior Minister María Paula Romo said 30 people had been arrested in the attack on the auditor's office. Firefighters said they extinguished the blaze after soldiers and police retook control of the building, which houses evidence in corruption investigations.
Ecuador, a former OPEC member, was left deeply in debt by a decade of high-spending governance and the oil price drop. Faced with a $64 billion debt and a $10 billion annual deficit, Moreno is raising taxes, liberalizing labor laws and cutting public spending in order to win more than $4 billion in emergency financing from the International Monetary Fund.
As part of that plan, Moreno eliminated a subsidy on the price of fuel on Oct. 2, driving the most popular variety of gasoline from $1.85 to $2.39 a gallon and diesel from $1.03 to $2.30. Panic and speculation sent prices soaring, with costs of some products doubling or more.
Ecuador's indigenous people, wracked by poverty and underserved by government programs, were infuriated. Over the last week, thousands of Shuar, Saraguro, Quechua and other indigenous people streamed into Quito from deep in the Amazon rainforest and high in the towns and villages of the Ecuadorian Andes. They have set up camp in the Casa de la Cultura, the neighboring park known as El Arbolito and three universities.
An indigenous leader and four other people have died in clashes with authorities, according to the public defender's office. The president's office has reported two deaths. Hundreds of protesters have been injured and hundreds more briefly detained.
The protests have halted activity in much of the southern end of the capital and prompted Moreno to temporarily move the seat of government to the Pacific port city of Guayaquil. Indigenous protesters also launched attacks on Amazon oil wells that have paralyzed production, the country's main export.