For the third time in two days, police are investigating a shooting that occurred along a metro Atlanta interstate.

A man was grazed by a bullet on I-285 in DeKalb County on Saturday morning when another driver pulled alongside him and opened fire, DeKalb police spokeswoman Officer Elise Wells said.

Officers were called to a gas station about 4 a.m. after the man, who was in his 40s, pulled over and called 911. Investigators said the shooting occurred several minutes earlier as the man drove along the Perimeter near Moreland Avenue.

“It appears that the victim was traveling down 285 when an unknown vehicle pulled up next to him and fired several rounds into the victim’s car,” Wells said in an emailed statement. It’s unclear what prompted the shooting.

The man was taken to the hospital and is expected to be OK, authorities said.

Saturday’s shooting comes one day after Houston rapper Chucky Trill was killed after being shot on I-85 in Gwinnett County. The rapper, whose legal name was Corey Detiege, was discovered shot inside a vehicle near the Jimmy Carter Boulevard exit about 3 a.m. and later died at a hospital, Gwinnett police said.

His manager confirmed his death to the Houston Chronicle, telling the newspaper the 33-year-old was in town for the NBA All-Star weekend. Detiege was the fourth person killed in a shooting on a metro Atlanta interstate since the start of the year.

“Obviously these types of shootings are very concerning for the police department,” Gwinnett police spokesman Cpl. Collin Flynn said Friday. “Not only do you have the two vehicles involved in the shooting, but you also have multiple people that are driving on the interstate that could also be victims in these types of crimes.”

About an hour before Detiege was killed, another man was taken to the hospital after being shot on I-75 in Clayton County. Police said the man was shot while driving in the southbound lanes near Mount Zion Road about 2 a.m.

“An occupant of a sedan fired a shot at the victim(’s) truck while he was driving,” Clayton police spokesman Officer Johnny Carroll said in a news release. “The bullet entered the cab of the truck through the rear window striking the victim, leaving him injured.”

All three interstate shootings remain under investigation, authorities said.