Complex sentence: Pakistan in return rejected the notion that it maintained ties with the Haqqani network or used it in a policy of waging a proxy war in neighboring Afghanistan; the Pakistani interior minister also warned that any incursion on Pakistani territory by U.S. forces will not be tolerated.
Split into simpler sentences: Pakistan in return rejected the notion that it maintained ties with the Haqqani network or used it in a policy of waging a proxy war in neighboring Afghanistan. The Pakistani interior minister also warned that any incursion on Pakistani territory by U.S. forces will not be tolerated.