The shooter, who has not yet been found, and another person are reported to have left the area on a moped or vespa after the attack. Police officers were called to the scene at 9.58am.
Many details are still unclear, but according to witnesses the shooter fired a weapon in the direction of two people, one of whom was hit by around half-a-dozen gun shots.
“One person has been taken by ambulance to the Sahlgrenska University Hospital,” police spokesman Christer Fuxborg told Swedish tabloid Aftonbladet.
Police have launched an investigation into attempted murder or manslaughter, but have not said whether or not the shooting is believed to be linked to gang violence, which has plagued the city in recent years.
In April, two men were killed in less than 24 hours in the Hisingen and Angered areas of the city, just a month after two people died and eight others were injured following a shooting in the Biskopsgården suburb – about 10 kilometres from Tuesday's attack. The events sparked a national debate about gun crime in Sweden's largest city.
“Today, the gang environment is… I don't want to exactly call it the Wild West, but something in that direction,” Amir Rostami, a leading authority on Sweden's organized crime groups told The Local after the Biskopsgården shooting.
Last year 52 shootings were reported in Gothenburg, killing four and wounding 21.