On Monday, the suspect in the weekend shooting death of three Palestinian-American college students in Vermont entered a not guilty plea to three counts of attempted second-degree murder. A judge also ordered the man’s detention without bond.

From the county jail, where he has been detained since his arrest on Sunday, the suspect, 48-year-old Jason J. Eaton, made an appearance via remote video stream during his arraignment at the Chittenden County Criminal Court in Burlington.

The attack is under investigation by local and federal authorities as a suspected hate-motivated crime. At the time of the shooting, two of the victims were wearing a keffiyeh, the traditional black-and-white checkered head scarf commonly worn in the Middle East, police said.

Police say Eaton used a pistol to shoot them on the street near the University of Vermont in Burlington on Saturday evening and then ran away.

All three remained under medical care on Monday, two with gunshot wounds in their torsos and one shot in the lower extremities. Two were in stable condition, while one has sustained much more serious injuries, police said.