A Massachusetts man has been indicted on new charges in an alleged terror plot to kill two prominent U.S. politicians and shoot people at American shopping malls.

Tarek Mehanna, of Sudbury, is accused of conspiring with two other men — Ahmad Abousamra, who authorities say is now in Syria, and an unnamed cooperating witness.

The 27-year-old Mehanna was arrested Oct. 21 on a charge of conspiring to provide material support to terrorists.

The 10-count indictment released Thursday also charges Mehanna and Abousamra with conspiracy to kill in a foreign country, conspiracy to provide false information to law enforcement and making false statements to law enforcement.

Authorities say the men allegedly talked about killing two members of the executive branch and plotted to randomly shoot shoppers. They also allegedly talked about killing U.S. soldiers in Iraq.