Condolence cards can be mailed to the family of little Leiby Kletzky at their home:
Reb Nachman and Esti Kletzky
5701 15th Avenue, Apt. 6J
Brooklyn, NY 11219
E-mail messages of condolence can be sent to
messageLeiby [at] gmail.com
Matzav.com reports that Leiby's family is sitting shiva (observing the period of mourning) at the above address, which is between 57th and 58th streets.
They are sitting shiva through Tuesday, from 10 a.m. to 1 p.m., from 3 p.m. to 6 p.m., and from 7 p.m. to 10 p.m., except during the Sabbath, which begins at approximately 8 p.m. tonight (Friday) and ends at approximately 9:30 p.m. tomorrow night (Saturday).
Visitors should dress modestly, should sit down, and should stay briefly. You might want to read How to Pay a Shiva Call.
Please be aware that Leiby's family has only been told that their son is no longer alive. They have not been told any details at all about the manner of his death. That would be too much for them to bear at this time.