FALL RIVER, MASS. (WHDH) - Police are investigating several armed convenience store robberies in Fall River to determine if the crimes are connected.

At least three stores were hit this week. An armed suspect stuck a gun to the head of two customers and a clerk at one store before robbing it. Hours earlier, two men were robbed at another store when police said a gunman threatened a clerk and his father. In that robbery, they got away with $1,700 cash.

Police said a third store was robbed of $3,000.

Police are investigating if the robberies are the work of Carlos Collazo and his suspected accomplice, Luis Cruz-Soto. Police said Cruz-Soto was arrested for stabbing a 33-year-old cab driver. He was allegedly shot at too but the shooter missed.

Another shooting happened in Fall River around the same time, where a 21-year-old was allegedly shot in the head. Police are not confirming if any of the incidents are connected.

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