Police are searching for a group of three young men involved in at least three random assaults over a roughly four-hour span in Brooklyn Tuesday, and they're hoping surveillance photos will lead to arrests. The first incident in the crime spree happened just before 4:30 p.m. in front of 2428 East 27th Street in Sheepshead Bay, where an 81-year-old man was walking when an unknown individual approached and asked, "Where is the B44 bus?" As the victim began to give directions, the individual punched him in the face before fleeing southbound, on foot, along East 27th Street towards Avenue Y.