Miami (CNN) -- Two southern Florida imams accused of supporting the Pakistani Taliban appeared briefly in a Miami federal court Monday, before a judge pushed back the legal proceedings into next week so the suspects could sort out their legal representation. 

The two men -- Hafiz Khan and his son Izhar Khan -- were arrested Saturday in South Florida, the Justice Department said. 

Another of Hafiz Khan's sons, Irfan Khan, was arrested that same day in El Segundo, California. Later Monday, he likewise remained in federal custody after putting off entering a plea during his own initial court appearance at the Roybal Federal Building in Los Angeles. 

Three others in Pakistan also have been indicted: Khan's daughter Amina Khan, Khan's grandson Alam Zeb and Ali Rehman. 

All six defendants face a four-count indictment that alleges they conspired to provide material support to a conspiracy to kill, injure and kidnap people abroad. It also alleges that they provided support to the Pakistani Taliban. 

About a dozen representatives of the two imams' Florida mosques -- Flagler Mosque in Miami for Hafiz Khan, and Jamaat Al-Mu'mineen Mosque in Margate for his son Izhar -- attended Monday's court session to support the men and hear the accusations against them. 

"He was their spiritual leader, so it is a shock, everyone is in shock," said Nezar Hamze, executive director of the south Florida chapter of the Council on American-Islamic Relations, of Hafiz Khan from the Miami court. 

The two were expected to be formally arraigned Monday, with the possibility of bail being set. But at the defendants' request, Magistrate Judge Barry Garber said that would instead happen on May 23. 
What state was Irfan arrested in?
Another of Hafiz Khan's sons, Irfan Khan, was arrested that same day in El Segundo, California