A deal that lets the United States send expelled migrants to Jamaica is drawing protests from the island's main opposition party, church leaders and civic groups, the Associated Press reported.

The agreement was signed on June 10. It allows the Trump administration to send non-Jamaican migrants to the island while they wait to travel on to their home countries. Jamaica joins nearly 30 nations that have agreed to accept migrants expelled by the United States.

The opposition People's National Party is demanding that the government publish the agreement. Its national security spokesman, Fitz Jackson, said Jamaicans “are being asked to trust a secret document that touches their security, their communities and their public services.” He said Parliament must approve it.

Jamaica's government says that under rules it finished in September, the United States will cover the costs and will not send any migrant with a criminal record. It says the UN's International Organization for Migration will look after migrants' needs while they are in the country.

Foreign Affairs Minister Kamina Johnson Smith said Washington opposes making the details public. “They have not generally released their agreements, and they have not agreed to release this one,” she said.

The deal matters to Haitians. Jamaica is one of the countries that regularly returns Haitian migrants who arrive by boat, and Haitians are among the nationalities the United States is deporting in growing numbers.