ISLAMABAD (AP) — A spokesman for Pakistan's national airline says a fire has broken out at its precision engineering department at the international airport in Karachi and is likely to damage spare parts.

Pakistan International Airlines spokesman Daniyal Gilani says firefighters are working to extinguish the blaze, which erupted early Saturday. He says no one was injured and the incident has not affected flight operations.

Gilani says it is not clear what caused the fire.