Pakistan said neighboring Iran has violated its airspace resulting in the death of two children, hours after Iranian state media said missiles targeted two bases of militant group Jaish al Adl in Pakistan's Balochistan province on Tuesday.

Islamabad warned that the incident could have "serious consequences" and was "completely unacceptable" in a statement released by Pakistan's foreign office spokesperson in the early hours of Wednesday.

There has been no official comment from Iran.

(With input from Reuters)