The mihrab, which probably derives from the prayer niche in mosques,
must point toward Mecca while the rug is in use.
So any rug with a Mihrab or point can be used. From the photo we cannot determine
if such a design is on the rug. It's possible that the guards opened it up and saw it.
I would think that they know what the interpretation of such a design would be which
is why it's being called a Muslim prayer rug.
Again - whether it is a prayer rug per se or not is not really that relevant. If anything found at the border has Arabic writing on it or looks like it came from a middle eastern country then that is not a good sign.
Again - whether it is a prayer rug per se or not is not really that relevant. If anything found at the border has Arabic writing on it or looks like it came from a middle eastern country then that is not a good sign.