Nigeria manager Stephen Keshi told reporters: "We are not part of this, we do not have interests in this. We are here to play football and that's it.
"If they want to investigate it whenever they want, that's their problem. We don't know anything about this stuff."
More top news
The 53-year-old received the accolade for services to drama from the Duke of Cambridge at Buckingham Palace on Tuesday.
A car bomber reportedly staged a suicide attack near a busy marketplace in Tuz Khurmatu, around 120 miles north of Baghdad.
Zimbabwe's President Robert Mugabe has resigned, ending a 37-year rule.