April 14. On this date in 1941, Shoghi Effendi "in reply to a question as to whether Brahma is 'to be considered as referring to absolute diety' and Krishna 'as the Prophet of the Hindu Religion', his secretary wrote '. . . such matters, as no reference occurs to them in the Teachings, are left for students of history and religion to resolve and clarify.' "

April 14. On this date in 1941, Shoghi Effendi "in reply to a question as to whether Brahma is 'to be considered as referring to absolute diety' and Krishna 'as the Prophet of the Hindu Religion', his secretary wrote '. . . such matters, as no reference occurs to them in the Teachings, are left for students of history and religion to resolve and clarify.' "

From Scriptures of Previous Dispensations, compiled by the Research Department of the Universal House of Justice.,,,

"Concerning Hindu prophecies of the coming of Bahá'u'lláh and the relationship of the Hindu and Bahá'í Faiths, nothing authentic and specific is available at the World Centre, apart from the Guardian's statement in God Passes By that 'To Him the Bhagavad-Gita of the Hindus had referred as the "Most Great Spirit," the "Tenth Avatar", the "Immaculate Manifestation of the Krishna"', (p. 95); and a brief reference to Bahá'u'lláh as 'to the Hindus the reincarnation of Krishna . . .' (p. 94). Bahá'í teachings on progressive revelation do, of course, bear on the relationship of these Faiths. In a letter written on behalf of the beloved Guardian it is also written that 'We cannot be sure of the authenticity of the scriptures of Buddha and Krishna . . . ' (November 25, 1950); and in reply to a question as to whether Brahma is 'to be considered as referring to absolute diety' and Krishna 'as the Prophet of the Hindu Religion', his secretary wrote '. . . such matters, as no reference occurs to them in the Teachings, are left for students of history and religion to resolve and clarify.' (April 14, 1941)"
(From a letter dated September 1, 1977 written on behalf of the Universal House of Justice to an individual believer)

Also here...

1696. Hinduism, Buddhism and Zoroastrianism (Following are some quotations taken from a compilation of extracts from letters written on behalf of the Guardian on these and related subjects, enclosed with a letter to an individual believer on November 30, 1980 from the Universal House of Justice)
Lesser Prophets: "Regarding your questions: We cannot possibly add names of people we (or anyone else) think might be Lesser Prophets to those found in the Qur'an, the Bible and our own Scriptures. For only these can we consider authentic Books."
(March 13, 1950, to an individual believer)
Asiatic Prophets: "Regarding your questions: The only reason there is not more mention of the Asiatic prophets is because their names seem to be lost in the mists of ancient history. Buddha is mentioned and Zoroaster in our scriptures--both non-Jewish prophets or non-semitic prophets. We are taught there always have been Manifestations of God, but we do not have any record of their names."
(October 4, 1950, to an individual believer)
Scriptures of Buddha and Krishna: "We cannot be sure of the authenticity of the scriptures of Buddha and Krishna, so we certainly cannot draw any conclusions about virgin births mentioned in them. There is no reference to this subject in our teachings, so the Guardian cannot pronounce an opinion.
"As our teachings do not state Zoroaster is the connecting link between the Euphrates and the Prophets in India, we cannot assert this.
"Abraham and Krishna are two separate individuals, with no connection that we know of.
"We know no more about the prophets mentioned in the Iqan than what Bahá'u'lláh states in that Book."
(November 25, 1950, to an individual believer)
Brahma and Krishna: "Your question concerning Brahma and Krishna: Such matters, as no reference occurs to them in the Teachings, are left for students of history and religion to resolve and clarify."
(April 14, 1941, to an individual believer)