Haas did not immediately respond to questions from CNA about those additional allegations.
Haas, 63, is the composer of several songs included in the "Gather" hymnal published by GIA, which is among the best-selling and most used hymnals in American Catholic parishes.
Among Haas' songs are some contemporary standards: "Glory to God," "You are Mine," "We are Called," and "Blest are They," among others.
GIA has "suspended" its sponsorship and publication of Haas' work.
On June 15, hymnal publisher OCP said it too would cut ties with Haas.
"We are profoundly disturbed by this news, and pray for all those involved," a June 15 tweet said.
"OCP has not published new music by Mr. Haas or sponsored him at events for decades, but in light of these allegations, we are immediately suspending all ties with him."
"While OCP's 2021 missals have already gone to print, we will determine the content of future publications in light of this situation. We take these allegations very seriously, and we stand with survivors and victims of abuse. We remain committed to prayer, reconciliation, human dignity, peace, and justice."
In his June 16 press release, Haas said that he considers himself "an advocate for survivors of clergy sexual abuse and discrimination of all kinds," and added that he "stands in solidarity and prayerful support of sexual abuse victims and encourages survivors to seek legitimate and appropriate professional services and/or to report any allegations to law enforcement."
Into Account responded Tuesday to Haas' statement, which accused the group of attempting to "market and solicit for potential clients," through its letter.
A statement said the group "stands by the survivors who have confidentially shared their experiences with us. While we are holding their names in confidence, none of their identities are unknown to us. Our services for survivors are, and always have been, free. We encourage all survivors to come forward who would like to do so."
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"If Mr. Haas believes there are any inaccuracies in what we've shared, we invite him to specify what they are."
Ed. note: This story has been updated since its initial publication.