The two were abducted from Jinnah Town area of provincial capital Quetta, Dawn Online reported.
According to witnesses, the unidentified men tried to abduct three of the foreigners, two women and one man. However, one of them managed to escape.
The report said that abductors forced the two into a vehicle at gunpoint and drove away.
A passerby was injured after one of the abductors opened fire at the scene.
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Jinnah Town is one of the affluent residential areas of the city.
Balochistan Chief Minister Nawab Sanaullah Zehri has ordered an immediate inquiry into the abduction. He directed the Balochistan Inspector General of Police to take immediate steps for an early recovery of the Chinese workers.
Chinese interest in Balochistan has spiked in recent years after the announcement of the China-Pakistan Economic Corridor (CPEC), which plans to connect Pakistani port of Gwadar to Xinjiang in China.
In the past, China has asked Islamabad to improve security, especially in Balochistan, where China is building a new port and funding roads as part of the CPEC.
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