An illegal migrant who was mistakenly deported from the US to El Salvador’s notorious mega prison is on his way back to the US to face charges.

Kilmar Abrego Garcia, 29, who entered the US illegally, was one of hundreds deported by Donald Trump. He will face criminal charges for allegedly transporting undocumented migrants within the US, ABC reported.

The US Supreme Court ordered the Trump administration to “facilitate” Mr Abrego Garcia’s return after he was mistakenly deported to El Salvador in March.

The White House initially refused, insisting Mr Abrego Garcia is a member of the notorious South American gang Ms-13, allegations his wife and lawyer have denied.

This is a breaking news story. More to follow.