The US and Canada have reached an agreement to turn away asylum seekers at unofficial border crossings, officials say. Large numbers of migrants cross at Roxam Road on the US-Canada border. The move closes a loophole created by a 2004 asylum deal with the US over where migrants should file their asylum claims.

That allowed Canada to turn away migrants at official entry points, but not at unofficial crossings. As part of the deal, Canada will now also create a new refugee program for 15.000 migrants fleeing persecution and violence in South and Central America, unnamed US officials told CBS News, the BBC's US affiliate.

Biden is in Ottawa, Canada, to discuss a series of economic, trade and immigration issues with Trudeau. The migration deal is expected to be announced before he returns to the US on Friday. The agreement is expected to allow officials on both sides of the border to turn back such asylum seekers heading in either direction.

The US side has also seen an increase in migrant crossings into Canada. The move is part of an effort to limit the flow of migrants on Roxham Road, an unofficial crossing between New York state and the province of Quebec.