Debris on a runway is a fairly common problem at large busy airports, but usually involves aircraft components, dead birds etc. and does not involve an interruption to operations of more than a few minutes. Exceptions to "routine" debris calls would be significant aircraft components (turbine disc, blades, engines, control surfaces etc.) or parts of the runway itself. If the runway surface is damaged, repair operations could take quite some time.
Let's hope that there is no significant interruption to operations.
Cheers,
Grog