Mexico City: Four gunmen riding in a fake police car have been arrested in Mexico after the real authorities noticed a spelling mistake on their otherwise identical vehicle.

The car was painted and outfitted to look exactly like the ones used by the federal police, but spelled the word ‘division’ with a ‘c’ instead of an ‘s.’

That aroused the suspicion of a military patrol in the western state of Michoacan, which stopped the vehicle and arrested the four men with guns and ammunition.

‘The detained suspects do not belong to any security force,’ the Michoacan authorities said in a statement Tuesday.

The state is the scene of frequent violence between drug cartels fighting each other for control of trafficking routes.