USCIRF expressed disappointment that India and Nigeria were not designated as CPCs.
No group has claimed responsibility for the attack.
Dozens of others were injured in the attack.
Local reports said the incident occurred in the province of Balochistan as the community came together to observe this significant religious occasion.
At least three suspects were arrested overnight in a possible link with the bombing and were being interrogated by intelligence and law-enforcement agencies.
A German woman accused of supporting the Islamic State is expected to be handed a verdict in her case in Frankfurt on Monday.
In one incident, soldiers severely beat eight children ages 6 to 16.
German police have deployed more than 1,000 officers to conduct raids on a financial network of the Islamic State terrorist organisation.
A U.S. helicopter raid in northern Syria killed a senior Islamic State leader who was in charge of planning attacks in the Middle East and Europe.
The United Nations said up to one million people have become victims of enforced disappearance in Iraq.
