Can multiple (3) alligator lizards of roughly the same size live in one tank?

I think they're southern alligator lizards. Two have the same pattern of scales and are almost exactly the same size, and the other one one is a little darker colored and a little larger. I have been keeping the darker of the three lizards (I caught the other two just today) since May in a tank with a water dish, climbing obstacle, dirt, and a 50 watt UVB light. I've been feeding him small crickets from the pet store. Can I keep these two lizards I found with him/her, or should I just let them go?