A U.S. envoy met with Vietnam's foreign minister in Hanoi Friday to seek more cooperation in accounting for missing American servicemen.

A Foreign Ministry spokeswoman said she had no details of the discussion between Gen. John W. Vessey Jr. and Foreign Minister Nguyen Manh Cam.Vessey had met Thursday with Le Mai, a deputy foreign minister in charge of North American affairs, the official said.

In talks earlier Thursday in Bangkok with Thai Foreign Minister Arsa Sarasin, Vessey said Vietnam was withholding information on missing Americans, Arsa told reporters.