(CNN) Representatives for the presidential campaigns of Pete Buttigieg and Bernie Sanders have requested that the Iowa Democratic Party begin a recount of select caucus sites that they had previously asked the party recanvassed, a party aide tells CNN.

Campaigns that participated in the recanvass -- those of Buttigieg, Sanders and Elizabeth Warren -- had until 6:45 p.m. CT Wednesday to inform the Iowa Democratic Party that they would like all or some of the sites they requested be recanvassed to be recounted. The aide said that the party had not received a request from Warren's campaign.

While Elizabeth Warren's campaign did observe the recanvass process, they did not submit a formal request for either a recanvass or a recount, the party aide said.

The rules of a recount in Iowa stipulate that a campaign's request may only be within the scope of the original recanvass. It cannot expand further than that, and it can include all the precincts recanvassed or look at a smaller amount of precincts.

The Sanders campaign originally filed recanvass requests in 28 precincts, while the Buttigieg campaign filed recanvass requests for 66 precincts and all in-state satellite precincts. The total requests were 143 precincts after duplicates were removed.

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