South Wales Police confirmed that four men, a 31-year-old from Waunwen, a 49-year-old from Gendros, a 37-year-old from Strand and a 39-year-old from Morriston, have all been detained.
Residents have said they are unable to return to their homes due to the ongoing police investigation.
A Welsh Ambulance Service spokesperson said:
“We were called today at 12:01pm to reports of an incident at Cwm Road, Swansea.
“We sent one emergency ambulance to the scene, where the crew were supported by a Cymru High Acuity Response Unit paramedic and an operations manager.
“Advanced critical care support was delivered by the Emergency Medical Retrieval and Transfer Service in a Wales Air Ambulance charity helicopter”
The National Police Air Service confirmed they were involved in an hour-long search for a suspect.
A spokesperson for the force said:
“At 12:40hr on Wednesday 11 September 2024, a helicopter from our NPAS St Athan base was on scene to assist South Wales Police in a suspect search in the Swansea area.”
Police say the investigation is ongoing whilst residents have been told the road is expected to remain closed and they may not be able to return home for some time.