WESTBURY - Police say the knifepoint robber responsible for at least a 15 hold-ups across Long Island has struck again, and have now increased the Crime Stoppers reward to $10,000.

The latest incident took place at a 7-Eleven on Powells Lane and Jericho Turnpike and in Westbury.

Police say around 12:30 a.m., a man with a large kitchen knife held up a worker and took cash.

They tell News 12 they believe the suspect is the same person who held up about 13 other businesses in Nassau since the beginning of March, and two in Suffolk.

Anyone with information is asked to call 1-800-244-TIPS