The acting US defence secretary has warned that the testing of anti-satellite (ASAT) weapons can create a "mess" in space after India destroyed one of its own satellites on Wednesday.
Patrick Shanahan said the US was still studying the Indian test, which Delhi insisted it carried out in low-earth orbit to not leave space debris.
India is the fourth country to have carried out an ASAT test.
China provoked international alarm with a similar test in 2007.