NEW YORK - Investigators confirm that a battery issue caused an NYPD body camera explode earlier this month.

Forensic analysis suggests that the camera malfunctioned while the officer wearing it tried to reset it using a paper clip.

• Nearly 3,000 NYPD Body Cameras Pulled After One Explodes in a Staten Island Precinct

Police believe the reset button may have dislodged and scraped the battery or that the battery was pierced by the paper clip.

After the incident, the NYPD pulled 3,000 body cameras of the same model.

So far, 850 of them have been replaced.

The department has deployed more than 15,000 cameras since last year.