US Defense Secretary Donald Rumsfeld is to travel to India this week to discuss arms sales to New Delhi and Pakistan.
Mr. Rumsfeld is expected to discuss US-India relations when he meets with Prime Minister Manmohan Singh on Thursday in New Delhi.
India wants to buy the Patriot missile system, which can defend against ballistic and cruise missiles, and aircraft.
India also is expected to raise its concern over Pakistan's request to buy up to 25 F-16 fighter jets from the United States.
Indian and Pakistani media say the prospect of American arms sales has stirred up opposition in both South Asian countries.
The two nuclear-armed rivals, which have fought three wars in the past five decades, are currently in peace talks over all outstanding issues.