An 18-year-old man is being held over two shootings on the Manor estate on Wednesday, January 6.
In the first incident a gun was fired at a property on Castledale Croft just before 8pm and an hour later there was another shooting on neighbouring Prince of Wales Road.
A 42-year-old woman and 23-year-old man who were inside the Castledale Croft house were injured but did not need hospital treatment.
There were no reports of injuries in the second incident, in which a person was fired at.
Both shootings are being treated as targeted attacks by detectives.
They are also believed to be linked.
A 27 year-old man arrested on suspicion of attempted murder yesterday remains in police custody today.
South Yorkshire Police said: “Detectives are still progressing the investigation and are still keen to hear from anyone with information or dash-cam footage.”