MEXICO CITY (AP) 鈥 Diplomatic relations between Mexico and Ecuador dramatically imploded after Ecuadorian police burst into Mexico's embassy in Quito and arrested Jorge Glas, Ecuador's former vice president.

Glas, arrested late Friday, had been convicted on charges of bribery and corruption and remains under investigation for other potential crimes. Following the arrest, leaders from across the Americas voiced outrage at the incident and Mexico's president announced he was breaking diplomatic ties with Ecuador.

But in a region that's no stranger to political explosions, what has provoked such fierce outrage?

International law experts and leaders across the region have said that the move violated long-established international laws that few rulers have dared to breach. It's almost an unprecedented act. To date, there are only a tiny handful of cases of raids on embassies on the books.

By forcing their way into the Mexican embassy to make the arrest, Ecuadorian police effectively intruded onto Mexican sovereign territory, said Natalia Saltalamacchia, a professor on international relations at the Autonomous Technological Institute of Mexico. Mexican President Andr茅s Manuel L贸pez Obrador called the break-in 鈥渁 flagrant violation of international law and the sovereignty of Mexico.鈥

The law Saltalamacchia, L贸pez Obrador and other leaders are citing is an accord dating back to 1963 known as the Vienna Convention on Consular Relations. It sets out clear rules on 鈥渄iplomatic immunity," which effectively blocks authorities from entering embassies by force, among other things.

By injuring diplomatic personnel within the embassy, Saltalamacchia said, Ecuador鈥檚 government violated another section of the accords.

鈥淲hen a state like Ecuador makes decision like that, you鈥檙e really endangering all the embassies of all the states in the world鈥 by ignoring precedent, Saltalamacchia said. 鈥淵ou enter into a state of anarchy, a sort of jungle law.鈥

Such rules have been established to maintain healthy diplomatic relations around the world, and allow diplomats to carry out their work without fear of retribution. The U.S. State Department exists to 鈥渆nsure the efficient and effective performance of their official missions on behalf of their governments.鈥

The Friday night raid is a move even the region鈥檚 most-criticized governments have hesitated to take, and something Ecuador's own government once declared illegal.

Most notably 鈥 and rather ironically 鈥 the British government threatened to raid Ecuador's embassy in 2012 to go after , who was seeking asylum in Ecuador.

鈥淲e are deeply shocked by the British government鈥檚 threats against the sovereignty of the Ecuadorian embassy and their suggestion that they may forcibly enter the embassy," said Ecuador's government at the time. 鈥淭his is a clear breach of international law and the protocols set out in the Vienna Convention."

British authorities never made good on their threat, and only a few examples of actual violations have been documented in recent decades.

Saltalamacchia cited the takeover of the , when diplomats were held hostage for 444 days. In Cuba, in 1956 before the Vienna Convention was agreed, nine people were killed in Haiti's embassy as a result of a raid by Cuban police under the Batista dictatorship.

In 1981, Cuba carried out another raid on Ecuador鈥檚 embassy to capture a number of officials seeking political refuge status.

The Organization of American States on Saturday also compared Friday's break-in to a 2022 incident when Nicaraguan authorities 鈥渋llegitimately occupied鈥 their own offices in Managua. The OAS also called for a meeting to discuss the Ecuador incident.

While embassies have also been attacked and raided in countries including Lebanon, Argentina, Libya, Indonesia and Thailand, those raids were carried out largely by insurgent groups.

Saltalamacchia said by arresting Glas, Ecuador's government may have also violated a regional agreement known as the 1954 Convention on Diplomatic Asylum, which allows individuals to seek asylum in embassies.

However, some have defended Ecuador.

Former Ecuadorian ambassador Jorge Icaza told The Associated Press that while he agreed that entering the embassy was illegal, he added it was improper to protect 鈥渁 criminal who was sanctioned by the Ecuadorian justice (system) in two very evident cases, which is also negative from the point of view of international standards鈥.

Ecuador's presidency on Friday night also alleged that Mexico's government had 鈥渁bused immunities and privileges granted to the diplomatic mission鈥 and granted 鈥渄iplomatic asylum contrary to the conventional legal framework.鈥

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