WASHINGTON, Aug 14 (Reuters) - A powerful U.S. committee

that scrutinizes foreign investments for national security

threats fined T-Mobile $60 million for failing to

prevent and report unauthorized access to sensitive data, senior

U.S. officials said on Wednesday.

The penalty, which represents the heftiest fine ever imposed

by the Committee on Foreign Investment in the United States, is

tied to violations of a mitigation agreement T-Mobile entered

into with the panel when it bought Sprint Corp for $23 billion

in 2020, the officials said.