Police have been on the scene of a standoff involving a barricaded man in Charlestown for hours.

A call came in at 4:27 p.m. Saturday for a report of a man barricaded within an apartment building at 30 Caldwell St. Police have been at the scene since that time, according to Officer Michael Torigian, a Boston Police Department spokesman.

The event has been labeled a “Code 99,” which can mean multiple things including a barricaded suspect, he said.

Another department spokesman on the scene confirmed that there had been no violent incidents during the barricade situation but that police remained on the scene.

The evening became even more chaotic as other officers responded to reports of smash and grabs in Downtown Crossing at around 8 p.m. While a police report was not yet available, Torigian said that event notes indicate there were between a baker’s dozen and 30 people suspected. The first of several calls came in for the area of 371 Washington St. just before 8 p.m. for a report of a larceny in progress.

This is a developing story.