بسم الله الرحمن الرحيم
If they do not own money equal to nisab except actual requisites i.e. they are poor then you may help them with the interest money received from the bank. However you should not make intention of reward while giving this money. Also do not give him such an amount at one time that makes him owner of nisab. They shall have full right to utilize the amount after they receive it from you in their needs or wherever they wish. And if they are not poor as per the definition of Shariah then it shall not be lawful to give them interest money as this amount is only the right of poor and needy ones. You cannot give this amount to everyone.
ويردونها على أربابها إن عرفوهم وإلا تصدقوا بها ؛ لإن سبيل الكسب الخبيث التصدق إذا تعذر الرد . (شامى 9: 553، مطبوعه: مكتبه زكريا ديوبند ، بحواله زيلعى).
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.