logical deduction - Three statements, who is saying the truth?

Bob: Steve is lying

Steve: Bob is lying

Fred: Steve is lying or Bob is lying

"or" is inclusive

How would I approach this question? I honestly have no idea. I was thinking of making a truth table and assuming that each of them is saying the truth once and then going through the statements, but i'm not sure how I would handle the "or" bit within a truth table.