Loud intermittint squealing noise coming from front of vehicle engine area when cold

Hi,

When my vehicle is cold, not warmed up yet, and I accelerate it makes a loud squeal. Most of the time, while the engine is still cold, and I'm driving it will continue until i slow down considerably then the noise wlll stop momentarily and then start up again. It will do this several times until the engine finally warms up and then i don't hear the noise anymore. What could it be?

Thanks in advance

Marge