A 23-year-old Johns Hopkins research assistant was fatally stabbed Sunday night in Charles Village during an apparent robbery, two days before the victim's birthday, according to city police.

Officers responded to a call of an attack at about 11:30 p.m. in the 2600 block of St. Paul St. and found the man in the road, suffering from stab wounds all over his body. The victim was transported to Johns Hopkins Hospital, where he was pronounced dead about 30 minutes later, police said. The victim was not identified, pending notification of kin.

Police have made no arrests in the incident.

It was the second fatal attack in the city Sunday night. At about 7 p.m., officers responded to a call for shots fired in the 1500 block of Lanhorne Court in East Baltimore and found a 30-year-old man suffering from a gunshot wound to the head sitting in a vehicle, according to police. Medical crews pronounced the man dead at the scene, police said. Officers are waiting to identify the man pending notification of kin.

Police have released no suspects and no motives.

In two other unrelated incidents, two men suffered non-fatal gunshot wounds.

A 23-year-old man was shot in the left thigh at about 10:15 p.m. in the 5200 block of Wilton Heights Ave. in Northwest Baltimore, according to police. The victim was transported by a friend to an area hospital. The victim told police that he was outside his home when an unidentified man attempted to rob him. Police say the victim was trying to run away when he was shot.

Later in the night, an unidentified man was shot in the leg in the 1500 block of Baker Ave. in West Baltimore, according to police. The man was taken to an area hospital at about 1:30 a.m., and his condition is unknown.

brent.jones@baltsun.com