Secretary of State John Kerry and other top White House officials on Thursday evening will brief congressional lawmakers about potential military action in Syria, a State Department spokesperson, but the briefing will be limited to unclassified information.

Spokesperson Marie Harf said Kerry will be joined on the 6 p.m. conference call by President Obama’s National Security Advisor, Susan Rice, Defense Secretary Chuck Hagel, Director of National Intelligence James Clapper and Adm. James Winnefeld, vice chairman of the Joint Chiefs of Staff. No classified information will be discussed on the call because of security concerns, Harf said. Lawmakers on the call will include the chairs and ranking members of the House and Senate panels that oversee national security, she said.