Salim (may Allah have mercy on him) narrates from his father (may Allah be pleased with him) that he used to say: "Nothing that passes in front of the person praying breaks the prayer."
(b) Abu Aqil narrated it as marfu' as well, but what is more correct is that it is mawquf.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3513