It’s been nearly four months since Cambridge police were called to the sound of gunfire, but an incident late Sunday brought officers to near Greene-Rose Heritage Park in The Port neighborhood.

Police are investigating on Harvard Street between the park and Washington Elms housing at 108 Harvard St. after getting alerts to gunfire at 11:24 p.m. from ShotSpotter technology. Calls followed, reporting a potential five shots fired. Multiple shell casings have since been recovered from the street, said Jeremy Warnick, director of communications and media relations for Cambridge police.

There are no known or reported injuries, and no arrests have been made.

The lack of injuries follows a pattern from years past – in 2022, there were 14 gunfire incidents, all but two of which had no known or reported victims – though this year’s previous incident, also in The Port, resulted in two people being shot and seriously hurt.

That previous incident took place at 8:18 p.m. Jan. 9, or 118 days ago, a block away at Washington and Windsor streets.

Anyone with information about the Monday incident is asked to call (617) 349-3300 or make contact anonymously.