Months before they participated in the September 11, 2001 terrorist attacks, Al-Qaeda operatives were spotted and approached at a Boston airport, according to a new report, but concerns raised at the time were ignored by authorities.

The New York Post reported on Sunday this week that newly unveiled court papers show for the first time that at least three eyewitnesses reported observing suspicious activity at Logan International Airport in Boston, Massachusetts in 2001 that was later linked to the Al-Qaeda hijackers.