A Johns Hopkins University researcher, originally from Cameroon, was detained by Immigration and Customs Enforcement officers earlier this week.
"Your clients are absolutely forbidden at this juncture to remove Mr. Abrego Garcia from the continental United States," Judge Xinis told government attorneys.
President Donald Trump on Sunday threatened to expand his military deployments to more Democratic-led cities.
A 38-year-old man was killed and five other people were wounded, including a 5-year-old girl, in a "mass shooting" in a Baltimore neighborhood Saturday night, police said.
A 13-year-old boy died after he was trapped in a storm drain in Maryland during heavy rainfall and flooding on the East Coast that also led to rescues from cars that were submerged in floodwaters, officials said.
A federal judge in Maryland has prohibited the Trump administration from taking Kilmar Abrego Garcia into immediate immigration custody if he's released from jail.