Police are asking for help tracking down two people in connection with a string of knifepoint robberies in Lower Manhattan.

Police say they all happened below Houston Street, starting on January 21. The most recent was last week, on February 27.

Investigators say in most of the robberies, one man robbed the store while the other stayed outside as a lookout.

Police say they've made off with more than $1,000 in all.

No one has been injured.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.