An American who joined ISIS was charged in federal court Thursday with providing support to the terror group.

Mohamad Jamal Khweis, 26, who grew up in Virginia, is the first ISIS-affiliated American to have been captured on the battlefield.

He appeared in court in Alexandria, Virginia, with family members and heard the charges he is facing. He didn’t speak during the hearing and will be held at least until another hearing later this month.

Khweis’ lawyer, John Zwerling, said after the hearing it was “too early to say” how his client would plead.

“Everything’s not as it appears in the government pleading,” Zwerling said, adding he just found out this morning his client was back in the U.S. and had been able to spend only an hour with him. “We will have our opportunity to explain the other side, at the appropriate time.”

Khweis’ father, Jamal, was with his son in court. “I’m just happy to see him today,” he told reporters.

The judge ordered Khweis remain in detention until the next hearing on June 14.

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