MANHATTAN BEACH -- Police in Southern California say someone left a dead pig in a Mitt Romney T-shirt outside a Republican campaign office.

Manhattan Beach police say the pig carcass clad in a blue Romney T-shirt was discovered on the doorstep of the office on Thursday morning.

Witness Andy Gaeta told KABC-TV he thought the body was a dead human when he saw police approach it, but then realized it was a pig, most likely from a butcher shop, with barbed wire around its head.

Animal control officers first put the pig in a trash bin, then returned and removed the bin as evidence in an investigation of illegal dumping of an animal carcass.

Police tell KABC (http://bit.ly/UcJaHM) they have no evidence of any other crime, and no note was left behind.

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Information from: KABC-TV, http://abclocal.go.com/kabc/