Two Chinese nationals were shot and injured on Tuesday in Karachi, Pakistan’s commercial center, according to police and hospital officials. This incident follows a series of attacks that have led Beijing to demand increased security for its citizens.

Faizan Ali, a senior superintendent of police, confirmed that two Chinese nationals were shot but did not provide additional details. A spokesperson for Liaquat National Hospital reported that both individuals were being treated, with one in serious condition.

According to Aaj News, the bullets were fired by a security guard.

It remains unclear who was behind the attack or whether it was linked to militant violence.

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In October, a bombing near Karachi’s international airport resulted in the deaths of two Chinese engineers, an attack claimed by the separatist militant group Baloch Liberation Army (BLA).