Emails in Clinton probe dealt with planned drone strikes

Democratic U.S. presidential candidate Hillary Clinton speaks during her California primary night rally held in the Brooklyn borough of New York, U.S., June 7, 2016.

USA: Emails between U.S. diplomats in Islamabad and State Department officials in Washington about whether to challenge specific U.S. drone strikes in Pakistan are at the center of a criminal probe involving Hillary Clinton's handling of classified information, the Wall Street Journal reported on Thursday.

The 2011 and 2012 emails were sent via the "low side" -government slang for a computer system for unclassified matters - as part of a secret arrangement that gave the State Department more of a voice in whether a CIA drone strike went ahead, according to congressional and law enforcement officials briefed on the FBI probe, the Journal said.