Three men charged with helping to support and finance the Pakistani Taliban, a group Washington considers a terrorist organization, are due in U.S. federal court Monday.
The U.S. Justice Department said Saturday the suspects are residents of the southeastern state of Florida, all naturalized American citizens of Pakistani descent.
Three other suspects remain at large in Pakistan.
U.S. authorities allege that the six used an elaborate system of bank accounts and wire transfers to funnel $50,000 to Pakistan to support militants and their families, and to buy weapons.
In addition, the U.S. said that one of the suspects, Hafiz Muhammed Sher Ali Khan, 76, an imam at the Flagler Mosque in Miami, Florida, operated a madrassa, or Islamic school in Swat, Pakistan that housed militants and taught children how to kill Americans in Afghanistan.
All six suspects have been accused of conspiring to murder, maim and kidnap people overseas and provide financial assistance to the Pakistani Taliban, a group that opposes the Pakistani government and has claimed responsibility for attacks against U.S. interests.
The Pakistani Taliban said it was behind Friday's suicide bombings that killed at least 80 people at a Pakistani military training facility. The group said the attack was revenge for the U.S. killing of al-Qaida leader Osama bin Laden early this month at his Pakistan hideout.
Aside from Khan, the U.S. filed charges against two of his sons, Izhar Khan, an imam at another Florida mosque, and Irfan Khan, all of whom live in the United States.
The three accused who reside in Pakistan include the elder Khan's daughter, Amina Khan, and her son, Alam Zeb. Ali Rehman is the third Pakistani named in the indictment.
If convicted, all six face up to 15 years in prison.