Leaders attending the Summit of the Americas are poised to issue a declaration pledging measures to curb illegal migration and help countries receiving large number of migrants to cope with them, according to a draft document seen by Reuters on Thursday.

The document, dated both June 6 and June 7, included commitments to work on convening banks to review their financial instruments for migrant-hosting countries, as well as improving migrants' access to public and private services.

It also lists pledges by Western hemisphere countries to work together to boost regional law enforcement cooperation, information sharing and visa regimes, while attempting to strengthen and expand temporary labor opportunities.

The White House and the State Department did not immediately respond to requests for comment on whether the draft was final.

Some nations were poised not to sign the summit declaration, according to one person familiar with the matter. Some Caribbean countries would not approve it, an official at the summit said.

U.S. negotiators are expected to work right up until the rollout ceremony to convince skeptical governments to accept, or at least, not openly oppose, the summit commitments. Some countries are likely to remain holdouts, the source said.

Alongside the declaration, the United States is slated to announce several migration programs, including some tied to the hiring of temporary workers from Central America, a Biden administration official said.