LONDON (AP) — A judge in Northern Ireland has dismissed one of the legal challenges to Britain's decision to leave the European Union, or Brexit.

A group of politicians in Northern Ireland had sued before the Belfast High Court, arguing that lawmakers in the Stormont Assembly should have a say on whether to trigger negotiations with Europe.

Lawyers for the Britain's government had argued there was no legal barrier to Brexit.

The case is separate from a landmark legal challenge being heard before Britain's High Court, which argues that Parliament needs to act before Prime Minister Theresa May can trigger negotiations to leave the 28-nation bloc.