Supporters of Myanmar’s junta attacked protesters demanding the end to the military government that took power in a coup, using slingshots, iron rods and knives Thursday to injure several of the demonstrators.

The violence complicates an already intractable standoff between the military and a protest movement that has been staging large rallies daily to demand that Aung San Suu Kyi’s elected government be restored to power. She and other politicians were ousted and arrested on Feb. 1 in a takeover that shocked the international community and reversed years of slow progress toward democracy.

Facebook, meanwhile, announced that it would ban all accounts linked to the country’s military as well as ads from military-controlled companies — a reflection of international outrage over the takeover.

On Thursday, tensions escalated on the streets between anti-coup protesters and supporters of the military. Photos and videos posted on social media showed groups attacking people in downtown Yangon as police stood by without intervening.

The number of injured people and their condition was not immediately clear.

According to accounts and photos posted on social media, hundreds of people marched Thursday in support of the coup. They carried banners in English with the slogans “We Stand With Our Defense Services” and “We Stand With State Administration Council,” which is the official name of the new junta.

When the marchers were jeered by bystanders near the city’s Central Railway station, they responded by firing slingshots, throwing stones and then chasing down the bystanders. One band that broke away stabbed and kicked a man they had chased. Video shows there had been both pro- and anti-coup crowds near the station Thursday.

Supporters of the military have gathered in the streets before, especially in the days immediately before and after the coup, but had not used violence so openly.

Critics of the military charge its pays people to engage in violence, allegations that are hard to verify. They have been raised during earlier spells of unrest, including a failed anti-military uprising in 1988 and an ambush of Suu Kyi’s motorcade in a remote rural area in 2003, when she was seeking to rally her supporters against the military regime then in power. SOVEREIGNPH

Such confrontations could make it harder to resolve Myanmar’s crisis.

SEEKING A REGIONAL RESPONSE

Indonesian Foreign Minister Retno Marsudi visited the Thai capital, Bangkok, on Wednesday and held talks with her Thai counterpart Don Pramudwinai and Myanmar’s new foreign minister, retired army colonel Wunna Maung Lwin. The meeting was part of Marsudi’s efforts to coordinate a regional response to the crisis in Myanmar.

“We asked all parties to exercise restraint and not use violence … to avoid casualties and bloodshed,” Marsudi said in a virtual news conference after her return to Indonesia.

Marsudi said she had conveyed the same message to a group of elected members of Myanmar’s Parliament who have formed a self-styled alternative government after being barred by the military coup from taking their seats in the takeover. The lawmakers are from Suu Kyi’s National League for Democracy party, which won a landslide victory in elections last November that would have given it a second five-year term in office.

Marsudi’s efforts echo those of the Association of Southeast Asian Nations, which has urged Myanmar’s military to make some concessions to help ease tensions. The 10-country regional grouping views dialogue with the generals as a more effective method of achieving compromise than more confrontational methods, such as the sanctions often advocated by Western nations.

Several countries have levied or are considering new sanctions against the military junta, and on Thursday, Facebook announced it, too, was taking action.

It said in a statement that it considered the situation in Myanmar an “emergency,” explaining that the ban on accounts linked to the military was triggered by events since the coup, including “deadly violence.”

Facebook already had banned several military-linked accounts since the coup, including army-controlled Myawaddy TV and state television broadcaster MRTV. The bans also apply to Instagram, which is owned by Facebook.