Error: Storage account wufoomibench04a4 has container(s) which have an active image and/or disk artifacts. Ensure those artifacts are removed from the image repository before deleting this storage account.

azure.err

vagrant@precise64:/vagrant/bootstrap2$ cat azure.err
Sun May 18 2014 04:20:48 GMT-0700 (PDT):
{ [Error: Storage account wufoomibench04a4 has  container(s) which have an active image and/or disk artifacts. Ensure those artifacts are removed from the image repository before deleting this storage account.]
  stack: [Getter/Setter],
  code: 'BadRequest',
  statusCode: 400,
  requestId: '5b45d15596aea758b61bdda2645d5d7e',
  __frame: 
   { name: 'storageAccount_deleteCommand__5',
     line: 146,
     file: '/usr/lib/node_modules/azure-cli/lib/commands/asm/storage.account._js',
     prev: undefined,
     active: false,
     offset: 9,
     col: 8 },
  rawStack: [Getter] }
Error: Storage account wufoomibench04a4 has  container(s) which have an active image and/or disk artifacts. Ensure those artifacts are removed from the image repository before deleting this storage account.
    at Function.ServiceClient._normalizeError (/usr/lib/node_modules/azure-cli/node_modules/azure-common/lib/services/serviceclient.js:785:23)
    at /usr/lib/node_modules/azure-cli/node_modules/azure-common/lib/services/filters/errorhandlingfilter.js:44:29
    at Request._callback (/usr/lib/node_modules/azure-cli/node_modules/azure-common/lib/http/request-pipeline.js:109:14)
    at Request.self.callback (/usr/lib/node_modules/azure-cli/node_modules/request/request.js:129:22)
    at Request.EventEmitter.emit (events.js:98:17)
    at Request.<anonymous> (/usr/lib/node_modules/azure-cli/node_modules/request/request.js:873:14)
    at Request.EventEmitter.emit (events.js:117:20)
    at IncomingMessage.<anonymous> (/usr/lib/node_modules/azure-cli/node_modules/request/request.js:824:12)
    at IncomingMessage.EventEmitter.emit (events.js:117:20)
    at _stream_readable.js:919:16
    at storageAccount_deleteCommand__5 (/usr/lib/node_modules/azure-cli/lib/commands/asm/storage.account._js:155:8)