Mustafa Mousab Alowemer, who was admitted into the country as a refugee in 2016, bought bomb-making materials and cased escape routes from the church, according to a criminal complaint.

Alowemer also shared marked-up satellite maps of the area around the building and a multi-point plan for the attack he’d written out by hand with an FBI informant and undercover agent, the complaint says.

Alowemer’s arrest comes asISIS’ territory in the Middle East has been virtually eliminated, and the pace of arrests in the US of people inspired by the group to attack has also slowed.

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President Donald Trump made blocking refugees and immigration from Syria and other terror-prone countries a major initiative as he campaigned for the White House ahead of the 2016 election. His travel ban was eventually upheld by the Supreme Court , which deferred to the President’s national security powers.

Alowemer is one of a small number of refugees who have been prosecuted in the US on charges related to ISIS, according to Seamus Hughes, a researcher from George Washington University’s Program on Extremism, which tracks terror cases.

Source: Syrian refugee arrested, accused of plotting attack on Pittsburgh church for ISIS