A surgical dentist in Puerto Rico fatally shot a patient who entered his office Friday and allegedly assaulted the dentist and his secretary, police said.

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The 41-year-old victim was reportedly upset about recent dental work he had done, a police statement said.

FILE - In this July 29, 2015 file photo, the Puerto Rican flag flies in front of Puerto Ricos Capitol as in San Juan, Puerto Rico. Puerto Ricos governor is pushing ahead with his top campaign promise of trying to convert the U.S. territory into a state, holding a Sunday June 11, 2017, referendum to let voters send a message to Congress. (AP Photo/Ricardo Arduengo, File)

In this July 29, 2015 file photo, the Puerto Rican flag flies in front of Puerto Ricos Capitol as in San Juan, Puerto Rico. (AP Photo/Ricardo Arduengo)

The incident occurred in the north coastal town of Manati, which is west of San Juan, the capital of Puerto Rico.

No further details were immediately available.

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Police said the case was under investigation and no charges had been filed.