A bicyclist was severely beaten late Tuesday afternoon on the Metropolitan Branch Trail, which runs through the District from Union Station to Silver Spring. The trail has been the scene of attacks on cyclists in the past.

The incident occurred about 5:30 p.m. near Third and R streets NE. Police listed it as an aggravated assault and said the victim suffered wounds that were serious but not life-threatening.

The man, who was in his late 30s, was covered with blood, with his left eye swollen shut, when a woman came upon him at Third and R. She said people were gathered around, urging him to remain awake while awaiting an ambulance.

It appeared, the woman said, that he had not been robbed. His bicycle was next to him. She said he was asked whether the attackers had said anything, and he indicated that they had not.

“Apparently they grabbed and beat him,” she said.

The woman said police appeared quickly, but apparently no arrests were made.

After several robberies were reported on the trail a year or two ago, police stepped up patrols there, and complaints appeared to decline.