Hundreds of Vietnamese boat people drowned or otherwise died violent deaths last year after authorities in Thailand turned the refugees back to sea, a U.S. human rights group charged today.Tuesday. The government The Thai government rejected the report as "prejudiced" and said all refugee boats were allowed to land. The Lawyers Committee for Human Rights, in its 193-page report, detailed several alleged incidents of murder and brutality by Thai authorities. It said Thai pirates "ravaged, raped and killed hundreds of Vietnamese boat people" pushed out to sea.