United Parcel Service is warning of a computer virus in wide circulation under the guise of an e-mail from UPS.

According to a release from UPS, the virus is attached to an e-mail that warns readers they have a shipment that couldn't be delivered unless they click on the attachment.

The e-mail claims the attachment contains a waybill that will allow the undelivered package to be picked up.

UPS says they rarely include attachments on their notification e-mails, and anyone who has any questions about the authenticity of their messages should contact them.