Police: 9-year-old robbed at knifepoint in Soundview

Police are searching for two teenagers who pulled a box cutter on a 9-year-old boy in Soundview. 
Authorities say the boy was riding his bike on Watson and Elder avenues just after 7 p.m. Sunday when the teens approached him. 
When the 9-year-old was stopped, one of the teens took out the box cutter while the other took his cellphone from his pocket. 
No arrests have been made.