A gunman sprayed bullets at a youth meeting in the basement of one of Tel Aviv's two gay centers Aug. 1, killing two people and injuring as many as 15, some seriously.
Killed were Nir Katz, 26, and Liz Trobishi, 16. Katz worked with the youth group as a counselor.
The shooter, who escaped, was masked and wearing black clothing.
Minister of Public Security Yitzhak Aharonovitch and others said the attack on the "Cafe Youth" social and support gathering at the clubhouse of the Israeli Gay, Lesbian, Bisexual and Transgender Association appeared to be a hate crime.
Demonstrations were staged in several Israeli cities Sunday in response to the attack, said Yonatan Gher, executive director of Jerusalem Open House for Pride and Tolerance. Some 500 people rallied in Jerusalem's Zion Square and there reportedly were smaller protests in Haifa and Beersheba.
Saturday at 8 p.m., there will be a large demonstration in Tel Aviv's Rabin Square. The event's Facebook page showed 547 confirmed attendees as of Monday afternoon.
Thousands marched the night of the shootings in a spontaneous outpouring of grief.
GLBT public actions also have taken place, or been announced, in Montreal; London; New York City; Washington, D.C.; Los Angeles and San Francisco.
"We will not step back into the dark closet, we shall not be terrorized," said openly gay Member of the Knesset Nitzan Horowitz, according to a translation provided by the Israeli Consulate in New York City. "We will carry on marching in Tel Aviv, in Jerusalem and in every other city or town. ... Years of incitement from politicians, Rabbis and public officials have materialized into this tragedy. We shall not forgive nor forget them."
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