Washington: The United States has said that Pakistan notified it about test firing of medium range surface-to surface ballistic missile "Hatf IV" but India, which carried out a back-to-back test of "Akash" anti-aircraft missile, did not.

Pakistan "did inform our Embassy in Islamabad" in advance of the medium range missile test, State Department spokesman Richard Boucher said.

Pakistan also issued a notice to mariners, he said, adding it notified neighbouring and other interested states.

Boucher said India did not notify the US about a test of a short-range anti-aircraft missile, "Akash".

"India has, however, notified us and neighbouring countries in the past of ballistic missile tests."

Hours after Pakistan test fired "Hatf IV" on October 4, India successfully tested its most lethal medium range surface-to-air missile "Akash" with a capability of carrying a payload of 55 kg and engaging four to six targets.

PTI