Three Iraqis convicted of "terrorism" were hanged on Monday, a security source said, days after a deadly double suicide attack in a crowded Baghdad marketplace killed over 30 people, AFP reported.

"Three people convicted under Article 4 of the anti-terror law were executed on Monday at the Nasiriyah central prison," the security source told AFP, on condition of anonymity.

A 2005 law carries the death penalty for anyone convicted of "terrorism," which can include membership of an extremist group even if they are not convicted of any specific acts.