MEXICO CITY (AP) — Mexico has acknowledged that the U.S. government has suspended all imports of Mexican avocados after a U.S. plant safety inspector in Mexico received a threat.

The surprise suspension was confirmed late Saturday on the eve of the Super Bowl, the biggest sales opportunity of the year for Mexican avocado growers.

Avocado exports are the latest victim of the drug cartel turf battles and extorsion of avocado growers in the western state of Michoacan, the only state in Mexico fully authorized to export to the U.S. market.

The U.S. government suspended all imports of Mexican avocados “until further notice” after a U.S. plant safety inspector in Mexico received a threatening message, Mexico’s Agriculture Department said in a statement.

“U.S. health authorities ... made the decision after one of their officials, who was carrying out inspections in Uruapan, Michoacan, received a threatening message on his official cellphone,” the department wrote.

Because the United States also grows avocados, U.S. inspectors work in Mexico to ensure exported avocados don’t carry diseases that could hurt U.S. crops.

It was only in 1997 that the U.S. lifted a ban on Mexican avocados that had been in place since 1914 to prevent a range of weevils, scabs and pests from entering U.S. orchards.

The inspectors work for the U.S. Department of Agriculture’s Animal and Plant Health Inspection Services.

It is not the first time that the violence in Michoacan — where the Jalisco cartel is fighting turf wars against a collection of local gangs known as the United Cartels — has threatened avocados, the state’s most lucrative crop.

After a previous incident in 2019, the USDA had warned about the possible consequences of attacking or threatening U.S. inspectors.

In August 2019, a U.S. Department of Agriculture team of inspectors was “directly threatened” in Ziracuaretiro, a town just west of Uruapan. While the agency didn’t specify what happened, local authorities say a gang robbed the truck the inspectors were traveling in at gunpoint.

The USDA wrote in a letter at the time that, “For future situations that result in a security breach, or demonstrate an imminent physical threat to the well-being of APHIS personnel, we will immediately suspend program activities.”

Many avocado growers in Michoacan say drug gangs threaten them or their family members with kidnapping or death unless they pay protection money, sometimes amounting to thousands of dollars per acre.

On September 30, 2020, a Mexican employee of APHIS was killed near the northern border city of Tijuana.

Mexican prosecutors said Edgar Flores Santos was killed by drug traffickers who may have mistaken him for a policeman and a suspect was arrested. The U.S. State Department said investigations “concluded this unfortunate incident was a case of Mr. Flores being in the wrong place at the wrong time.”