A US senator has met a man who Trump administration officials have acknowledged was deported in error from Maryland to a mega-prison in El Salvador.

Maryland Senator Chris Van Hollen posted photos with Kilmar Ábrego García, as the administration continues to resist his return to the US despite yet another court ruling against the government on Thursday.

After the meeting, which appeared to take place in a hotel, El Salvador's President Nayib Bukele said the detainee would remain in the country's custody.

The White House has accused Mr Ábrego García of being a member of the transnational Salvadoran gang MS-13, a designated foreign terrorist organisation, which his lawyer denies.