The three attackers slit people's throats, said an emergency responder, Reaction Unit South Africa. Paramedics or doctors who can assist can report to the scene, ' RUSA said in an statement released today.
A section of the mosque was set ablaze, according to several media reports.
Three people have been left with serious injuries following an attack at the Imam Hussain Mosque in Ottawa, Verulam.
More details are awaited.
The man died on the way to hospital in the Durban area, Mr Balram said, adding the two others remained in a critical condition.
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Reaction Unit SA said witnesses told them three men armed with knives and guns had attacked the mosque, attacking the victims, and setting the building alight. The fire department is also on scene.
"A mosque is a religious institution‚ and South Africa's Constitution guarantees and protects the right to religious practices". A section of the mosque was set ablaze and smoke was billowing from the side of the building, Balram said.
"There is a knife that was recovered at the scene, we believe the knife is suspected to have been used in the crime", the KwaZulu-Natal police spokeswoman Captain Nqobile Ngwala said at the scene. About 1.5% of the country's population is Muslim. Nothing was taken from the mosque or from the victims, that's why we're saying it doesn't look like a robbery.
The Muslim holy month of Ramadan is due to start next week.
Social activist Yusuf Abramjee said he had seen information being circulated online that the attacked mosque belonged to the Shia sect.