Detectives arrested a 15-year-old boy in connection to a robbery happened in the area of Colman Street on October 28.
The juvenile faces robbery and larceny charges.
Authorities also arrested a 14-year-old girl in connection to a robbery on Thursday in the area of Boulder Drive and Jefferson Avenue.
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She is facing conspiracy to commit robbery and larceny charges.
Further details on the robberies have not yet been released.
Officials say the investigations remain active.
Anyone with information on these crimes are urged to contact the New London Police Department at (860) 447-5269 ext. 0.
You can also text the New London 411 tips system by texting NLPDTip plus the information to 847411.