(CNN) – Nine people have been killed after gunmen opened fire at a Coptic Christian church near the Egyptian capital of Cairo, the Health Ministry told CNN.

One of the attackers was also killed by Egyptian security forces, said ministry spokesman Khaled Megahed.

The assault was carried out at the St. Mina Coptic church in Helwan, a district on the southern edge of the Egyptian capital. It was not immediately clear who the attackers were or how many were involved.

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Among the nine killed were eight Christians and a police officer, who was Muslim.

Five others have been injured, including two in critical condition, according to the Health Ministry.

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