Updated

Two Pakistani-born brothers are facing lengthy prison sentences after pleading guilty in Florida to charges that they plotted a terrorist attack against New York City landmarks.

U.S. District Judge Beth Bloom was set to sentence 32-year-old Sheheryar Alam Qazi and 22-year-old Raees Alam Qazi on Thursday. The men pleaded guilty in March to several terrorism-related charges, including conspiracy to provide material support.

The brothers also pleaded guilty to assaulting two U.S. marshals while being escorted in the Miami court complex.

Authorities say the alleged plot never got beyond planning stages. The FBI says Raees Qazi traveled to the city in 2012 to scout targets but didn't attempt any attacks. He was arrested after returning to Broward County, Florida, where the brothers lived.

Key evidence includes FBI wiretap and other communications intercepts.