The actresses had come for a charity function, headed by the wife of army chief General Rajendra Chhettri for benefit of victims of last year's devastating earthquake.
General Samir Shai was at the Tribhuvan International Airport (TIA) on Friday to receive Sinha while other senior army officials received Khan, local media reports said, adding that such acts will "demoralise" the army and "reduce its prestige."
"The welcome by the army personal was a normal incident," the spokesperson told PTI.
The Army General welcomed the actress outside of the airport, which is normal, he said.
The army personnel worked in close coordination of the Nepal Police personnel for providing necessary security for the two actresses, he added.
Regarding media report about seeking clarification from the army by the government in the matter, the Army said it has no information regarding the matter.