FBI seeking information to identify English-speaking man in ISIS video

WATCH: The U.S. is trying to identify a masked jihadi, likely a North American, who’s believed to be responsible for brutal acts in Syria. At the same time, U.S. defence officials warn more ground will likely be lost to ISIS.  Jackson Proskow reports.

The FBI is asking for the public’s assistance in identifying an English-speaking man who appears in an ISIS propaganda video purportedly showing prisoner executions.

In the video released Sept. 19, a masked man is heard switching between Arabic and English and speaking with a North American accent.

The FBI has posted part of the video on its website with the hope someone will recognize the man’s voice.

“We’re hoping that someone might recognize this individual and provide us with key pieces of information,” said Michael Steinbach, assistant director of the FBI’s Counterterrorism Division, in a statement. “No piece of information is too small.”

Information can be submitted to the FBI through its website fbi.gov/ISILtips.

The man who appears in the video wears camouflage, with a black mask, and is standing in front of men, identified as Syrian prisoners, who are shoveling their own graves.

He later appears to order their execution.

READ MORE: Are the critics right? Are bombing campaigns enough to take on ISIS?

U.S. citizens have been traveling overseas to fight alongside the Islamic State terrorist group, also known as ISIS.

On Saturday a 19-year-old Chicago man was arrested at O’Hare International Aiport for attempting to travel to the Middle East to join ISIS.

“We need the public’s assistance in identifying U.S. persons going to fight overseas with terrorist groups or who are returning home from fighting overseas,” said Steinbach.

A U.S- led campaign targeting the al-Qaida splinter group with airstrikes has been ongoing since August.

Late Tuesday evening, a divided House of Commons voted in favour of sending Canadian aircraft and personnel to join the combat mission against ISIS.