Brazil's Supreme Court ordered house arrest for former President Jair Bolsonaro, who is standing trial for allegedly plotting a coup.Brazil's Supreme Court on Monday ordered the house arrest of Jair Bolsonaro. The former president is standing trial for allegedly leading a coup attempt after losing the 2022 election to Luiz Inacio Lula da Silva. Why did the court order house arrest for Bolsonaro? Justice Alexandre de Moraes, who is overseeing the case against Bolsonaro in court, issued the order. He said in his decision that Bolsonaro had violated the precautionary measures imposed on him in July. Last month, the Supreme Court ordered that Bolsonaro wear an electronic ankle monitor and imposed a curfew on his activities during the trial. The far-right leader was also barred from using social media after being accused of trying to disrupt the trial with fiery speeches shared online by his sons and allies. Under the ban, third parties are barred from sharing his public remarks. On Sunday, allies of Bolsonaro defied the court order by broadcasting a live call between the 70-year-old and one of his sons at a pro-Bolsonaro rally. As well as ordering house arrest, this latest order also banned the 70-year-old from receiving visits, with exceptions for lawyers and people authorized by the court. Moraes also ordered the seizure of mobile phones from Bolsonaro's home in Rio de Janeiro. What were Sunday's protests about? Brazil saw tens of thousands of Bolsonaro supporters take to the streets of its main cities on Sunday. The protesters called for an "amnesty" for Bolsonaro and others involved in the alleged coup attempt. Bolsonaro supporters stormed Brazil's congress in January 2023 and called for the military to take over the country's government. In the call broadcast at the Sunday's Rio rally, Bolsonaro repeated claims of fraud during the 2022 election and said Brazil's institutions had been "hijacked." Bolsonaro didn't attend the demonstration in person as although he wasn't yet on house arrest, he was banned from leaving home on weekends and holidays. Pro-Bolsonaro protests Bolsonaro's calls for protests during his legal battles have seen declining attendance in recent months. Why were Bolsanaro supporters waving US flags? Many of the protesters in Sunday's rallies carried United States flags and signs supporting US President Donald Trump. Bolsonaro's conservative base is supportive of Trump's pressure campaign on Brazil to stop what the US president has called a "witch hunt" against Bolsanaro. Trump imposed 50% tariffs on a raft of products imported from Brazil, including coffee, late last week, directly tying these to the Bolsonaro trial. That is the highest tariff rate Trump has imposed on any country in the world. The Trump administration has also put sanctions on Moraes under the Global Magnitsky Act, which allows the US to sanction foreigners it considers human rights abusers. Edited by: Srinivas Mazumdaru