Most of the removed networks were in the early stages of building their audiences, the Menlo Park, California-based company said Tuesday. Facebook’s announcement on Tuesday, part of its monthly reporting on efforts to rid its platforms of fake accounts, represents one of the larger crack downs by the company in recent months.

“We have been growing this program for several years,” said David Agranovich, Facebook’s global threat disruption lead. “I would expect to see this drum beat of take downs to continue.”

In one example, the company removed a network of more than 300 accounts, pages and groups on Facebook and the photo-sharing app Instagram that appear to be run by a years-old troll farm located in Albania and operated by the Mujahedeen-e-Khalq opposition group. The group appeared to target Iran, but also other audiences with content about Iran, according to a report released by Facebook.

The group was most active in 2017, but increased its activity again in the latter half of 2020. It was one of a handful of the influence campaigns that likely used machine learning technologies capable of creating realistic profile photos to the naked eye, Facebook said in the report.

The company also removed 118 accounts, eight pages and 10 Instagram accounts based in Spain and El Salvador for violating the company’s foreign interference policy. The group amplified criticism of Henry Flores, a mayoral candidate in Santa Tecla, El Savador and supportive commentary of his rivals, the company said.

The social media giant also took down a network of 29 Facebook accounts, two pages, one group and 10 Instagram accounts based in Iran that was targeting Israel. The people behind the network posed as locals and posted criticism about Isreali prime minister Benjamin Netanyahu, according to Facebook. The company also took down networks based in Argentina, Mexico, Egypt and other nations.

Nathaniel Gleicher, Facebook’s head of security policy, said the company has improved its ability to identify inauthentic accounts, but said bad actors continue to change their strategies to avoid Facebook’s detection.

–With assistance from Kurt Wagner.